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Note: You must activate Lock SIM card before you can change your SIM PIN code.
To change an existing SIM Card PIN:
1. Tap Change SIM PIN.
2. Enter the old SIM PIN code and tap OK.
3. Enter the new SIM PIN code and tap OK.
4. Re‑type the new SIM PIN code and tap OK.

Password Settings

When you create a phone password you can also configure the phone to display the
password as you type it instead of using an asterisk (*).
►From the Security screen, tap Make passwords visible to activate this feature.

Device Administration

Activating this feature allows Google to administrate your phone in a way similar to IT
security settings on a corporate PC. This would be beneficial in the case that your phone
was lost or stolen. The device could be “deactivated” or “restricted” (through administration)
from a remote location.
1. From the Security screen, tap Device administrators to begin configuring this
setting.
2. Select an administrator device and follow the prompts.

Unknown Sources

Before you can download a web application you must enable the Unknown sources feature
(enables downloading). Developers can use this option to install non‑Play Store applications.
►From the Security screen, tap Unknown sources to active this feature.