LG LM-K420YM User Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Cell Phone
  5. LM-K420YM
  6. User manual

LG LM-K420YM User Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
USER GUIDE
LM-K420YM
Copyright ©2020 LG Electronics Inc. All rights reserved.
www.lg.com
MFL71756201 (1.0)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the LM-K420YM and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for LG LM-K420YM

Summary of Contents for LG LM-K420YM

  • Page 1 USER GUIDE LM-K420YM Copyright ©2020 LG Electronics Inc. All rights reserved. www.lg.com MFL71756201 (1.0)
  • Page 2 ENGLISH About this user guide Thank you for choosing this LG product. Please carefully read this user guide before using the device for the first time to ensure safe and proper use. • Always use genuine LG accessories. The supplied items are designed only for this device and may not be compatible with other devices.
  • Page 3 Instructional notices WARNING: Situations that could cause injury to the user and third parties. CAUTION: Situations that may cause minor injury or damage to the device. NOTE: Notices or additional information. About this user guide...

  • Page 4: Table Of Contents

    Table of contents Guidelines for safe and efficient use Custom-designed Basic Functions Features Product components and accessories Camera features Parts overview Audio recording features Turning the power on or off Google Assistant Installing the SIM card Fingerprint recognition Inserting the memory card Multi-tasking feature Removing the memory card Battery...
  • Page 5 Lock screen & security Clock Privacy Calculator Location Music Extensions ThinQ Apps Audio Recorder Battery Game Launcher Storage Smart Doctor Accounts LG Mobile Switch Digital Wellbeing & parental controls App trash Google RemoteCall Service System Cell Broadcast Accessibility Google apps Table of contents...
  • Page 6 Appendix LG Language Settings LG Bridge Phone software update Anti-Theft Guide Open Source Software Notice Information Regulatory information (Regulation ID number, E-labeling, etc.) Trademarks Laser safety statement DECLARATION OF CONFORMITY More information Table of contents...
  • Page 7 ID position in sudden call drop and applications loaded. The log is used only to help determine the cause of the fault. These logs are encrypted and can only be accessed by an authorised LG Repair centre should you need to return your device for repair.
  • Page 8 Product care and maintenance • Use only in-box accessories which are authorised by LG. LG does not guarantee any damage or failure which is caused by third party accessories. • Some contents and illustrations may differ from your device without prior notice.
  • Page 9 • Do not use, touch or attempt to remove or fix broken, chipped or cracked glass. Damage to the glass display due to abuse or misuse is not covered under the warranty. • Your device is an electronic device that generates heat during normal operation. Extremely prolonged, direct skin contact in the absence of adequate ventilation may result in discomfort or minor burns.
  • Page 10 Efficient device operation Electronics devices All devices may receive interference, which could affect performance. • Do not use your device near medical equipment without requesting permission. Please consult your doctor to determine if operation of your device may interfere with the operation of your medical device. •...
  • Page 11 Avoid damage to your hearing To prevent possible hearing damage, do not listen at high volume levels for long periods. Damage to your hearing can occur if you are exposed to loud sound for long periods of time. We therefore recommend that you do not turn on or off the handset close to your ear.
  • Page 12 Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to the instructions. • If you need to replace the battery, take it to the nearest authorised LG Electronics service point or dealer for assistance. •...
  • Page 13 Make sure to protect your personal information to prevent data leakage or misuse of sensitive information. • Always back up important data while using the device. LG is not responsible for any data loss. • Make sure to back up all data and reset the device when disposing of the device to prevent any misuse of sensitive information.

  • Page 14: Custom-Designed Features

    Custom-designed Features...

  • Page 15: Camera Features

    Camera features Wide-angle camera You can take photos or record videos with a wider range than your actual field of vision by using the wide-angle on the rear camera. x1.0 , then tap to switch between the standard and wide- angle.
  • Page 16 Portrait You can take a sharp portrait by applying the camera lens blur effect. , then tap Portrait. to take a photo. • Keep the distance to your subject within 1.3 ~ 5.0 feet when using the rear camera. • This feature is not available if the surroundings are too dark.
  • Page 17 AI CAM You can effectively take photos or record videos since the camera recognises the object when taking a photo or recording a video. , then tap AI CAM. When the object is recognised, the best effect for the scene is applied. •...
  • Page 18 Sticker You can apply a variety of stickers to your photos or videos. You can create richer content by using 3D AR Effect. and select Sticker by swiping camera modes. • Select a desired sticker by swiping stickers. to take a photo, or tap and hold to record a video.

  • Page 19: Audio Recording Features

    Engine and tap to activate it. • If you connect an external audio device such as an earphone or speaker to the product, a pop-up appears to turn on the LG 3D Sound Engine feature. Google Assistant Google Assistant overview Your device has the built-in Google Assistant feature.
  • Page 20 • The device saves your voice data for recognition. Set whether to use the voice match unlock function. • If you use the voice match unlock function, you can unlock the device even when the device screen is turned off or the device is charging by saying “OK Google”...

  • Page 21: Fingerprint Recognition

    PIN, or password method for unlocking the screen. • If the device cannot detect your fingerprint or you forgot the value specified for registration, visit the nearest LG Customer Service Centre with your device and ID card. Custom-designed Features...
  • Page 22 Precautions for fingerprint recognition Fingerprint recognition accuracy may decrease due to a number of reasons. To maximise the recognition accuracy, check the following before using the device. • At the bottom centre of the product’ s screen, there is a built-in sensor that recognises fingerprints.
  • Page 23 Registering fingerprints You can register and save your fingerprint on the device to use fingerprint identification. On the home screen, tap Settings Lock screen & security Fingerprints. • A lock screen must be set in order to be able to use this feature. •...
  • Page 24 When the fingerprint registration is done, tap OK. • Tap Add more to register another fingerprint. Since the fingerprint recognition success rate depends on the condition of the registered fingerprint, it is recommended that you register several different fingerprints. Managing fingerprints You can edit or delete registered fingerprints.

  • Page 25: Multi-Tasking Feature

    Multi-tasking feature Recent Uses Screen Swipe the Home button upward and hold to view the recent use history. Pop-up window You can open multiple apps on the screen and easily switch between them at any time. Swipe up on from the bottom of the screen. Tap the app icon on the top left of the app screen and select Pop-up window.
  • Page 26 Using the pop-up window • : Minimises the pop-up window. The pop-up window is minimised into the app icon floating on the screen, which can be moved anywhere you want. • : Expands the app to full screen. • : Closes the app. •...
  • Page 27 To deactivate the multi window feature, drag the centre bar up or down to the end of the screen. • The multi window feature is not supported in some LG apps or apps downloaded from the Play Store. Custom-designed Features...

  • Page 28: Basic Functions

    Basic Functions...

  • Page 29: Product Components And Accessories

    Always use genuine LG Electronics accessories. Using accessories made by other manufacturers may affect your device's call performance or cause malfunctions. This may not be covered by LG's repair service. • Some of the device parts are made of tempered glass. If you drop your device on a hard surface or subject it to severe impact, the tempered glass may be damaged.

  • Page 30: Parts Overview

    Parts overview Earpiece Proximity/Ambient light sensor Front camera lens Volume keys (+/-) Power/Lock key /Fingerprint sensor Google Assistant key Touch screen Stereo headset jack Charger/USB cable port Microphone Rear camera lenses Nano-SIM/ Memory card tray Flash Speaker Microphone Basic Functions...
  • Page 31 Do NOT attempt to remove the back cover by yourself. • Doing so may severely damage the battery and device, which could cause overheating, fire, and injury. This device’ s back cover and battery are not to be removed or replaced by a non-qualified professional. •...
  • Page 32 • Fingerprint sensor - Turn on the fingerprint recognition feature to simplify the process of unlocking the screen. See Fingerprint recognition overview details. • Some functions may be restricted depending on the region and product specifications of different telecommunications providers. •...
  • Page 33 There are two microphones built into this product. Be careful not to cover the microphones. While you are talking on the phone, do not cover the microphone with your hand or fingers. Do not use a phone case that is not a genuine product or cover the microphone with accessories, tape, etc.

  • Page 34: Turning The Power On Or Off

    Turning the power on or off Turning the power on When the power is turned off, press and hold the Power/Lock key. • When the device is turned on for the first time, initial configuration takes place. The first booting time for the smart phone may be longer than usual.

  • Page 35: Installing The Sim Card

    Installing the SIM card Insert the SIM (Subscriber Identity Module) card provided by your service provider to start using your device. • Be careful with the ejection pin since it has a sharp edge. • In order for the water-resistant and dust-resistant features to work effectively, the card tray must be inserted correctly.
  • Page 36 SIM card. Always use a factory-made SIM card supplied by the operator. • Do not lose your SIM card. LG is not responsible for damage and other issues caused by loss or transfer of a SIM card. •...

  • Page 37: Inserting The Memory Card

    Inserting the memory card Insert the memory card into your device. The device can support up to a 2 TB microSD card. Depending on the memory card manufacturer and type, some memory card may not be compatible with your device. Insert the ejection pin into the hole on the card tray.

  • Page 38: Removing The Memory Card

    Do not remove the memory card while the device is transferring or accessing information. This may cause data to be lost or corrupted, or may damage the memory card or the device. LG is not responsible for losses that result from the abuse or improper use of memory cards, including the loss of data.
  • Page 39 • If there is moisture on the charging port, exposed terminals, charging cable, charging adapter, etc., do not use or charge the product. The product may malfunction or get broken or damaged, and there is risk of injury caused by electric shock, fire, overheating, explosion, etc. If you find moisture on such areas, stop using or charging the product immediately and completely remove the moisture.
  • Page 40 Precautions when using the device • Make sure to use the USB cable provided; do not use third party USB cables or chargers with your device. The LG limited warranty does not cover the use of third party accessories. •...

  • Page 41: Touch Screen

    Touch screen You can familiarise yourself with how to control your device by using touch screen gestures. Tapping Lightly tap with your fingertip to select or run an app or option. Touching and holding Touch and hold for several seconds to display a menu with available options.
  • Page 42 Double-tapping Tap twice quickly to zoom in or out on a web page or map. Dragging Touch and hold an item, such as an app or widget, then move your finger to another location in a controlled motion. You can use this gesture to move an item.
  • Page 43 Pinching and spreading Pinch two fingers to zoom out such as on a photo or map. To zoom in, spread your fingers apart. • Do not expose the touch screen to excessive physical shock. You might damage the touch sensor. •...

  • Page 44: Home Screen

    Home screen Home screen overview The Home screen is the starting point for accessing various functions and apps on your device. Swipe up from the bottom edge of any screen to directly go to the Home screen. You can manage all apps and widgets on the Home screen. Swipe the screen left or right to view all installed apps at a glance.
  • Page 45 • Status bar: View status icons, the time and the battery level. • Weather widget: View the information of weather and time for a specific area. • Google Search widget: Type or speak to pull open Google Search. • Folder: You can create folders to classify the app based on desired criteria.
  • Page 46 Status icons When there is a notification for an unread message, calendar event or alarm, the status bar displays the corresponding notification icon. Check your device’ s status by viewing notification icons displayed on the status bar. No signal Data is being transmitted over the network Alarm is set Vibrate mode is on Bluetooth is on...
  • Page 47 Notifications panel You can open the notifications panel by dragging the status bar downward on the main screen. • You can drag down the notice window or tap the arrow icon to open the list of quick setting icons. • You can tap to add, delete or arrange icons in the notice window.
  • Page 48 Switching the screen orientation You can set the screen orientation to automatically switch according to the device’ s physical orientation. On the notification panel, tap Rotation from the quick access icon list. You can also tap Settings Display and activate Auto-rotate screen on the home screen.
  • Page 49 • To change the grid, touch and hold on a blank area of the Home screen, then select Grid. Tap the desired grid, then tap Apply. • To configure the Home screen settings, touch and hold on a blank area of the Home screen, then select Home screen settings.
  • Page 50 Viewing the background theme You can view only the background image by hiding the apps and widgets on the Home screen. Spread two fingers apart on the Home screen. • To return to the original screen, which displays apps and widgets, pinch your fingers on the Home screen or drag up from the bottom edge of the screen.
  • Page 51 Using folders from the Home screen Creating folders On the Home screen, touch and hold an app, then drag it over another app. • A new folder is created and the apps are added to the folder. Editing folders On the Home screen, tap a folder and do one of the following actions. •...

  • Page 52: Screen Lock

    • Google feed: Show to the left of the main Home screen. • Sort apps by: Set how apps are sorted on the Home screen. • Hide apps: Select which apps you want to hide from the Home screen. • Loop Home screen: Enable to allow continuous Home screen scrolling (loop back to first screen after the last screen).
  • Page 53 Setting a screen lock There are several options available for configuring the screen lock settings. On the home screen, tap Settings Lock screen & security Select screen lock and then select the method you prefer. Customise the following settings: • None: Deactivate the screen lock function.
  • Page 54 You can turn the screen on or off by double-tapping the screen. • This option is available only on the Home screen provided by LG. It may not function properly on a custom launcher or on the Home screen installed by the user.

  • Page 55: Memory Card Encryption

    Turning the screen off Double-tap on an empty space on the Home screen and Lock screen. You can also double-tap an empty space on the status bar. Disable KnockON If you don’t want to use the KnockON function, set as follows: On the home screen, tap Settings Extensions KnockON and drag it to disable the function.

  • Page 56: Taking Screenshots

    • Encrypted files are accessible only from the device where the files were encrypted. • The encrypted memory card cannot be used on another LG device. To use the encrypted memory card on another mobile device, format the card. •...

  • Page 57: Content Sharing

    Content sharing Playing content from another device You can play photos, videos or songs saved on your device from a TV. Connect the TV and your device to the same Wi-Fi network. While viewing the items in the Gallery or Music app, tap Play on other device.

  • Page 58: Do Not Disturb

    Sending or receiving files You can share files between your device and another LG device, or a tablet. Sending files From the Gallery or other apps, tap Share or , then select a device on the file sharing list. Receiving files Drag the status bar downward and then tap File sharing.
  • Page 59 - Messages from: Set up a range of notifications when receiving a message. • Use Do not disturb: Turn on the Do not disturb feature. • Sleeping: Set the schedule for which you want to turn on the Do not disturb feature.

  • Page 60: Useful Apps

    Useful Apps...

  • Page 61: Installing And Uninstalling Apps

    Installing and uninstalling apps Installing apps Access an app store to search and download apps. • You can use SmartWorld, Play Store or the app store provided by your service provider. • Some app stores may require you to create an account and sign in. •...

  • Page 62: App Shortcuts

    Installing and uninstalling apps during the setup When you turn on the device for the first time, you can download recommended apps. You can skip to the next step without installation. App trash You can view the uninstalled apps. You can also reinstall apps which were uninstalled within 24 hours from now.

  • Page 63: Phone

    • This feature is available only on some apps. Phone Voice call Make a phone call by using one of the available methods, such as manually entering a phone number and making a call from the contact list or the list of recent calls.
  • Page 64 • To enter "+" when making an international call, touch and hold number • Adding contacts for details on how to add phone numbers to the speed dial list. Making Calls from Contacts On the home screen, tap Contacts. After selecting the number you want to call from the list of contacts, Answering a call To answer a call, drag on the incoming call screen.
  • Page 65 Checking an incoming call while using an app When a call comes in while using an app, a pop-up notification can be displayed at the top of the screen. You can receive the call, reject the call, or send message from the pop-up screen. •...
  • Page 66 Making a three-way calling You can make a call to another contact during a call. During a call, tap Add call. Enter a phone number and tap • The two calls are displayed on the screen at the same time, and the first call is put on hold.

  • Page 67: Messaging

    Messaging Sending a message You can create and send messages to your contacts using the Messaging app. • Sending messages abroad may incur additional charges. Consult with your service provider for more information. On the home screen, tap Specify a recipient and create a message. •...

  • Page 68: Camera

    Camera Starting the camera You can take a photo or record a video to cherish all of your memorable moments. On the home screen, tap • Before taking a photo or recording a video, wipe the camera lens with a soft cloth.
  • Page 69 Start Google Lens. Set timer setting Switch to front-facing/ Set flash setting rear-facing camera Apply filter effect Take photo Set camera aspect ratio Preview Set camera Current camera mode Select zoom • You can run the camera app by short-pressing the power key twice. On the home screen, tap Settings Extensions Shortcuts and then tap Open Camera to activate it.
  • Page 70 Allows you to take a photo by saying ‘Cheese’ , ‘Smile’ , Cheese shutter ‘Whiskey’ , ‘Kimchi’ , or ‘LG’ . Tag locations Save the image with GPS location data. Select if you want to store the pictures and videos in the Storage Internal storage or SD card.
  • Page 71 Camera modes Using camera modes Recording a video and select Video by swiping camera modes. to record a video. Set camera Set flash setting Set video resolution Apply filter effect Select zoom Preview Switch to front-facing/ rear-facing camera Recording a video Useful Apps...
  • Page 72 • To take a photo while recording a video, tap • To pause the video recording, tap . To resume the video recording, • While recording a video, you may spread or pinch two fingers to zoom in or out. •...
  • Page 73 • Photos are taken every 3 seconds and saved as a GIF file. • on the screen to select the number of photos you want to take. • While taking photos, tap to create GIF files with previously taken photos. •...
  • Page 74 Useful camera features Google Lens You can get more information or take action on items around you using Google Lens, like landmarks, posters, restaurant menus, animals, flowers, or barcodes, directly in the device. Auto-Exposure/Auto-Focus lock You can fix the current exposure level and focus position by touching and holding the screen in the Auto mode.
  • Page 75 Switching between cameras You can switch between the front and rear cameras to suit your environment. • To switch between the front and rear cameras, swipe the screen up or down on the shooting screen in the Camera app. • Use the front camera to take selfies.
  • Page 76 Using the Burst Shot You can take consecutive photos and view them as moving pictures in the Gallery. and select Photo. Tap and hold • Multiple, consecutive photos are taken while you are holding down Gesture shot You can take selfies by using gestures. Show your palm to the front camera and then clench your fist.
  • Page 77 Auto shot You can use the face detection feature to take selfies easily and conveniently. You can set the device so that, when you look at the screen, the front camera detects your face and takes a selfie automatically. • The white coloured guide frame appears when the front camera detects your face.

  • Page 78: Gallery

    Gallery Gallery overview You can view and manage photos and videos saved on your device. Viewing photos You can view the photos saved to the product. and select a desired folder. Tap a desired photo. • The Gallery folder contains Photos, Albums and Play. Back to the previous Access additional options.
  • Page 79 Playing a video You can view the videos saved to the product. Back to the Access additional previous screen options Pause or play the video Preview gallery Add to or remove from Delete images your favourites Share images Edit images •...
  • Page 80 Deleting files You can delete files by using one of the following options: • Touch and hold a file from the file list, then tap Delete. • Deleted files are automatically moved to Trash and they can be restored to the Gallery within 7 days. •...
  • Page 81 Resetting files Previewing a file Deleting files Adding files • A maximum of 50 videos can be used to create a movie. Making a GIF You can easily make a GIF file using recorded video. and select Create GIF. Creating video At the desired starting point while watching a video, tap Select the length of the GIF you want to create.

  • Page 82: Contacts

    GIF photographs function may lead to a civil or criminal liability in accordance with the related laws. Be cautious not to copy or transmit another person’ s work without authorization. LG Electronics is not liable in any way for such acts by users.
  • Page 83 Importing contacts You can import contacts from another storage device. On the contact list screen, tap Manage contacts Import. Select the source and target locations of the contact you want to import, and then tap OK. Select the contacts and tap Import. Adding contacts to the speed dial list On the contact list screen, tap Speed dial.
  • Page 84 Contacts list Editing contacts On the contact list screen, select a contact. On the contact detail screen, tap and edit details. Tap Save to save changes. Deleting contacts You can delete contacts by using one of the following options: • On the contact list screen, touch and hold a contact you want to delete, then tap .

  • Page 85: Quickmemo

    QuickMemo+ QuickMemo+ overview You can make creative notes by using a variety of options on this advanced notepad feature, such as image management and screenshots, which are not supported by the conventional notepad. This device supports the Active Pen AES2.0 (Active Electrostatic). Creating a note On the home screen, tap Essentials QuickMemo+.
  • Page 86 • : Erase handwritten notes. • : Undo the previous edit. • : Redo the recently deleted edits. • : Crop the screen as you desire. and save the notes. • Saved notes can be viewed in Gallery. Additional features after capturing a screenshot Tap to capture entire screen by using the scroll capture feature.

  • Page 87: Clock

    Clock Alarm You can set an alarm to trigger it at a specified time. On the home screen, tap Essentials Clock Alarm. to add a new alarm. Configure the alarm settings and tap Save. • If you select a previously set alarm, you can edit the alarm. •...

  • Page 88: Calculator

    • To record a lap time, tap Lap. Tap Pause to suspend the stopwatch. • To resume the stopwatch, tap Resume. To clear all the records and restart the stopwatch, tap Reset. • Calculator You can use two types of calculators: the simple calculator and the scientific calculator.

  • Page 89: Thinq

    Turn on/off Flash Light. Set sound effects. Access additional options. Back to the previous screen. Pause or play. Tap to play from the Tap to play the next file / beginning of the current Touch and hold to fast file / Double-tap to play forward.

  • Page 90: Audio Recorder

    • Washing machine, dryer, styler, dishwasher, oven, and robot cleaner can only be registered when the product is in the standby mode. • Look for the ThinQ mark on the product to see if it can be connected to ThinQ app. •...

  • Page 91: Smart Doctor

    You can use Smart Doctor to diagnose the device’ s condition and optimise On the home screen, tap Management Smart Doctor. LG Mobile Switch Easily transfer data from a used device to a new device via LG Mobile Switch. On the home screen, tap Management LG Mobile Switch.

  • Page 92: Remotecall Service

    RemoteCall Service Your device can be remotely diagnosed for resolving issues. First, make a phone call to an LG Customer Service Centre as follows: • To use this function, first you must agree to usage of the function. • If you use mobile data, you may be charged for data usage depending on your pricing plan.
  • Page 93 Calendar The Calendar app allows you to track your schedule of events (that you created), organised by Day, 3-day, Week or Month. Chrome A fast, simple, and secure web browser, built for the modern web. Docs Docs is a collaborative, word-processing tool that powers productivity. Use Docs to create, edit and work together in real-time.
  • Page 94 Play Movies & TV Use your Google Account to rent or purchase movies. Purchase content and play it anywhere. YT Music A new music streaming service from YouTube. Sheets Sheets is a collaborative spreadsheet processing tool that powers productivity. Use Sheets to import, organise and analyse information together in real-time.

  • Page 95: Settings

    Settings...

  • Page 96: Network & Internet

    Settings You can customise the device settings in accordance with your preferences. On the home screen, tap Settings. • If you enter a keyword on the search window at the top of the screen, you can conveniently run the items that need to be set. Network &...
  • Page 97 • This feature depends on the service provider. • : Customise Wi-Fi network settings. Wi-Fi Direct You can connect your device to other devices that support Wi-Fi Direct to share data directly with them. You do not need an access point. You can connect with more than two devices by using Wi-Fi Direct.
  • Page 98 • When connecting to a computer, download the USB driver from www.lg.com and install it on the computer. • You cannot send or receive files between your device and a computer while USB tethering is turned on. Turn off USB tethering to send or receive files.
  • Page 99 Wi-Fi hotspot You can set the device as a wireless router so that other devices can connect to the Internet by using your device’ s mobile data. On the settings screen, tap Network & internet Tethering Wi-Fi hotspot and then tap to activate it.
  • Page 100 • This option uses mobile data and may incur data usage fees, depending on your pricing plan. Consult with your service provider for more information. • More information is available at this web site: http://www.android.com/tether#Bluetooth_tethering Help You can view help on using tethering and hotspots. On the settings screen, tap Network &...
  • Page 101 You can connect to a safe virtual network, such as an intranet. You can also manage connected virtual private networks. Adding VPN On the settings screen, tap Network & internet VPN. • This feature is available only when the screen lock is activated. If the screen lock is deactivated, a notification screen appears.

  • Page 102: Connected Devices

    Connected devices Bluetooth You can connect your device to nearby devices that support Bluetooth to exchange data with them. Connect your device to a Bluetooth headset and a keyboard. This makes it easier to control the device. Pairing with another device On the settings screen, tap Connected devices Bluetooth.
  • Page 103 File sharing You can send and receive files between your device and other LG devices or tablets. On the settings screen, tap Connected devices File sharing. Customise the following settings: •...

  • Page 104: Sound

    • Save to: Set the destination folder to save files sent from other devices in. • File sharing: Permit receipt of files sent from other devices. • SmartShare Beam: Share files with other devices via SmartShare Beam. • Help: You can view help on sharing files. Printing You can connect your device to a Bluetooth printer and print photos or documents saved on the device.
  • Page 105 - Normalize volume: Use the function to normalise the volumes of different sound sources. - Equalizer: Use the function to adjust the equaliser settings. - LG 3D Sound Engine: Use the function to play music or video in three-dimensional, immersive and vivid sound when earphones, LG 3D speaker or other external audio devices are connected.

  • Page 106: Notifications

    Notifications You can check a list of installed apps, and configure the settings for notifications. On the settings screen, tap Notifications. Customise the settings as desired. Display You can customise detailed settings for each screen type. On the settings screen, tap Display and customise the following settings: •...

  • Page 107: Wallpaper & Theme

    • Auto: Set the device so that the screen brightness is automatically adjusted in accordance with the ambient light intensity. • Screen timeout: Automatically turn off the screen when the device is left idle for a specified period of time. •...
  • Page 108 • Select screen lock: Select the desired screen lock method. See Setting a screen lock for details. • Customize Lock screen: Change the information displayed on the locked screen. • Secure lock settings: Change the secure lock settings. • Fingerprints: Use your fingerprint to unlock the screen or content. Fingerprint recognition overview for details.

  • Page 109: Privacy

    Privacy You can find and adjust all your privacy settings. On the settings screen, tap Privacy. Customise the settings. • Permission manager: Allows you to check and change the permissions granted to the apps. • Lock screen: Allows you to set notifications to show on the lock screen.

  • Page 110: Location

    Location You can check how your location information is shared and configure the permission to access your location information. On the settings screen, tap Location and set the desired function. Extensions Smart Doctor You can use Smart Doctor to diagnose the device’ s condition and optimise On the settings screen, tap Extensions Smart Doctor.
  • Page 111 Dual App You can install duplicate messenger apps on the product and use two accounts at the same time. On the settings screen, tap Extensions Dual App. After reading the disclaimer, tap Confirm. In the list of available apps, tap Install to install a copy of a desired app and follow the on-screen instructions.

  • Page 112: Apps

    KnockON Double-tap the screen to turn the screen on or off. KnockON for details. Apps You can check a list of installed apps, and configure the settings for notifications, app permissions, and more. On the settings screen, tap Apps. Customise the settings. Battery You can view the current battery information or turn on power-saving mode.

  • Page 113: Storage

    Storage You can view and manage internal storage on the device or storage space of the memory card. On the settings screen, tap Storage. Customise the following settings: • Internal storage: View the total storage space and free space in the device’...

  • Page 114: Google

    • Manage keyboards: You can change the product’ s basic keyboard setting, set the use environments for LG Keyboard or other installed keyboards, and set the speech recognition function for Google Voice input. Also, you can set whether to display the keyboard button in the touch button area on the home screen so that you can quickly switch to another keyboard.
  • Page 115 You can back up data saved on your device to another device or account. On the settings screen, tap System Backup. Customise the following settings: • LG Mobile Switch: Allow you to transfer data from an old LG device to your new LG device. See LG Mobile Switch for details.
  • Page 116 • Backup & restore: Back up your device data or restore data to your device from a backup. • Resetting your device may delete backup files saved in storage. Make sure to copy and store the important backup files to your PC. •...

  • Page 117: Accessibility

    • Factory data reset: Reset all settings for the device and delete data. • Restarting and resetting your device deletes all data on it. Enter your device name, Google Account and other initial information again. • After data initialization, the data cannot be restored. About phone You can view information about your device, such as the name, status, software details and legal information.
  • Page 118 • Vision Window zoom: Zoom in or out within a window and invert the colour. • Vision Large mouse pointer: Magnify the mouse pointer. • Vision High contrast screen: Turn the background colour into black for a high contrast screen. •...
  • Page 119 • Motor & cognition Screen timeout: Turn off the screen automatically when the device is left idle for a specified period of time. Motor & cognition Touch control areas: Limit the touch area • so that only a particular portion of the screen can be controlled by touch input.

  • Page 120: Appendix

    Appendix...

  • Page 121: Lg Language Settings

    See LG Bridge help for details. • The supported features may vary depending on the device. • LG USB driver is a necessary program to connect your LG smartphone with the computer and is installed when you install LG Bridge. LG Bridge functions •...

  • Page 122: Phone Software Update

    This feature allows you to conveniently update the firmware on your phone to a newer version from the Internet without needing to visit a service centre. This feature will only be available if and when LG makes a newer firmware version available for your device.
  • Page 123 This feature allows you to conveniently update your phone’ s software to a newer version via OTA, without connecting a USB cable. This feature will only be available if and when LG makes a newer firmware version available for your device.

  • Page 124: Anti-Theft Guide

    Anti-Theft Guide Set up your device to prevent other people from using it if it's been reset to factory settings without your permission. For example, if your device is lost, stolen, or wiped, only someone with your Google Account or screen lock information can use the device.

  • Page 125: Open Source Software Notice Information

    In addition to the source code, all referred license terms, warranty disclaimers and copyright notices are available for download. LG Electronics will also provide open source code to you on CD-ROM for a charge covering the cost of performing such distribution (such as the cost of media, shipping, and handling) upon email request to opensource@lge.com .

  • Page 126: Trademarks

    Trademarks • Copyright ©2020 LG Electronics Inc. All rights reserved. LG and the LG logo are registered trademarks of LG Group and its related entities. • Google, Google Maps, Gmail, YouTube, Google Duo, Google Play, Android, Chrome, Google Photos, Google Play Protect, Google Calendar, Google Docs, Google Drive, Google Sheets and other related marks and logos are trademarks of Google LLC.

  • Page 127: Laser Safety Statement

    To prevent direct exposure to laser beam, do not try to open the enclosure or make direct contact with the laser. DECLARATION OF CONFORMITY Hereby, LG Electronics declares that this LM-K420YM product is in compliance with the essential requirements and other relevant provisions of Directive 2014/53/EU.

  • Page 128: More Information

    • If you drop your device on a hard surface or subject it to severe impact, the tempered glass may be damaged. If this happens, stop using your device immediately and contact an LG Customer Service Centre. • You can purchase protective cases to protect your device from damage on the market.
  • Page 129 Guide to data transfers • For the data that can be exchange between LG devices or between the LG device and a third party device, see the following table. Third party LG device Android iOS device device → → Type Item details →...

  • Page 130: Faq

    Make sure device is charging at a normal temperature. Check the charger and its connection to the device. Use only in-box accessories which are authorised by LG. The battery depletes faster than when first purchased When you expose the device or the battery to very cold or hot temperatures, the battery life may be reduced.
  • Page 131 The touch screen may malfunction in humid conditions or when exposed to water. Restart your device to clear any temporary software bugs. If the touch screen is scratched or damaged, visit a LG Electronics Service Centre. Appendix...
  • Page 132 Make sure the Bluetooth wireless feature is activated on the device you wish to connect to. Make sure your device and the other Bluetooth device are within the maximum Bluetooth range (10 m). If the tips above do not solve your problem, contact a LG Electronics Service Centre. Appendix...
  • Page 133 A connection is not established when you connect the device to a computer Make sure the USB cable you are using is compatible with your device. Make sure you have the proper driver installed and updated on your computer. Downloaded application causes a lot of errors Application has problems.

This manual is also suitable for:

K42

Table of Contents