1. Press
>
>
Settings
>
Security
>
Set up SIM card lock
.
2. Select the
Lock SIM card
check box.
3. Enter your SIM PIN and tap
OK
.
To change the SIM PIN:
1. Press
>
>
Settings
>
Security
>
Set up SIM card lock
>
Change SIM PIN
.
2. Enter your current SIM PIN and tap
OK
.
3. Enter a new SIM PIN, tap
OK
, re-enter the new SIM PIN, and tap
OK
.
Make Passwords Visible
You can hide your password or PIN as you type it.
1. Press
>
>
Settings
>
Security
.
2. Clear the
Make passwords visible
check box.
Reset Password
Set or change the password for performing device reset and factory data reset. See
Device
Reset
and
Factory Data Reset
. The default value is 0000.
1. Press
>
>
Settings
>
Security
>
Reset password
.
2. Enter your password and tap
Continue
.
3. Enter your new password and tap
Continue
.
4. Confirm your new password and tap
OK
.
Device Administrators
You can enable or 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. Press
>
>
Settings
>
Security
>
Device administrators
.
2. Tap an application you want to enable or disable the authority to be a device
administrator of and then tap
Activate
or
Deactivate
.
Unknown Sources
Follow the steps below to allow installation of non-Play Store applications.
1. Press
>
>
Settings
>
Security
.
Settings
152