Set Up SIM Card Lock
Protect your SIM card with a PIN.
1. Tap
> Tools or Apps
2. Select the Lock SIM card check box.
3. Enter your SIM PIN and tap OK.
4. To change your SIM PIN, tap Change SIM PIN.
5. Enter your current SIM PIN and tap OK.
6. Enter a new SIM PIN, tap OK, re-enter the new SIM PIN, and tap OK.
Device Administrators
You can disable the authority to be a device administrator of certain applications. If disabled,
you will typically lose some functionality in those applications, such as the ability to sync
new email or calendar events to your phone.
1. Tap
> Tools or Apps
2. Tap an application you want to disable the authority to be a device administrator.
Unknown Sources
Follow the steps below to allow installation of non-Play Store applications.
1. Tap
> Tools or Apps
2. Tap Unknown sources > OK.
Credential Storage
These options let you control how your phone accesses and stores secure certificates,
passwords, and other credentials.
> Settings > Security > Set up SIM card lock.
> Settings > Security > Device administrators.
> Settings > Security.
Settings 199