Settings
Set up SIM card lock
You can set up a PIN to lock your SIM card, which prevents unauthorized use of your SIM card if someone attempts to use it another device.
◌From Settings, tap 
Security > Other security settings > Set up SIM card lock and follow the prompts.
•Tap Lock SIM card to turn on the feature.
•Tap Change SIM card PIN to create a new PIN.
View passwords
You can have characters displayed briefly in password fields as you type them.
◌From Settings, tap 
Security > Other security settings > Make passwords visible to turn on the feature.
Device administration
You can authorize security features and apps (like Find My Mobile) to have administrative access to your device.
1.From Settings, tap 
Security > Other security settings > Device admin apps.
2.Tap an option to turn it on as a device administrator.
Credential storage
You can manage the trusted security certificates installed on your device, which verify the identity of servers for secure connections.
◌From Settings, tap 
Security > Other security settings for the following options:
•Storage type: Select a storage location for credential contents.
•View security certificates: Display certificates in your device’s ROM and other certificates you have installed.
•User certificates: View user certificates that identify your device.
•Install from device storage: Install a new certificate from storage.
•Clear credentials: Erase credential contents from the device and reset the password.
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