Huawei Mate Xs User Manual page 110

Set a SIM PIN Lock
A PIN is the identity code of a SIM card, and can be set as the SIM card lock. After doing so,
you will be required to enter the correct PIN to unlock the SIM card every time you power on
your device or switch to a new device to prevent unauthorised access.
You need to obtain the PIN of your SIM card from your carrier before using this function.
1
Go to Settings > Security > More settings > Encryption and credentials to enter the
SIM lock setup screen.
2
Enable Lock SIM card, enter the PIN code, and then touch OK.
To modify the PIN, touch Change SIM PIN and follow the instructions.
You will have to enter a PIN Unlocking Key (PUK) to unlock the SIM card if you exceed
•
the maximum number of failed attempts to enter the PIN. A new PIN needs to be set
up once you successfully unlock your SIM with a PUK. Should you also exceed the
maximum number of failed attempts to enter the PUK, your SIM card will be blocked.
The PUK can only be obtained from your carrier.
•
Pin a Screen
You can pin the screen of an app so you can stay focused on it. Try this feature when playing
games, watching videos, and more.
Go to Settings > Security > More settings > Screen pinning, and enable Screen
pinning.
When using gesture navigation, swipe up from the bottom of the screen and hold to access
•
the recent tasks screen, then touch
the bottom of the screen.
When using three-key navigation, touch
•
on an app preview. To unpin, touch and hold
Safe Mode
Safe mode uses a simplified operating system with only basic functions and pre-installed
apps available. It can be used to locate third-party apps causing system failures.
Safe Mode Functions
After installing certain third-party apps, your device may fail to work properly. In this case,
you can enter Safe mode to check whether the problem has been caused by a third-party app
or by the system itself.
on an app preview. To unpin, swipe up twice from
to access the recent tasks screen, and touch
.
Settings
106