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Device Lock Settings
Changing the Device Lock Password / PIN:
- From the home screen, select "Menu"
- Go to "Settings"
- Scroll to and select "Security Settings" > "Activate Phone Code"
- Select "Change phone code"
- Type in the old password and then select "OK"
- Type in your new password and select "OK", then retype the new password for confirmation, and once again, press "OK"
Enabling Device Lock:
- While on the home screen, select "Menu"
- Scroll to and select "Settings" > "Security Settings" > "Activate Phone Code"
- Type in the password and select "OK"
- Enter the password again to confirm, and then select "OK". "Phone locked" should appear on the display
Disabling Device Lock:
- From the home screen, press "Menu"
- Navigate to and select "Settings" > "Security Settings" > "Activate Phone Code"
- Type in the password and select "OK". "Phone Unlocked" should appear on the display
SIM PIN Settings
Changing the SIM PIN code:
- While viewing the home screen, select "Menu"
- Navigate to and select "Settings"
- Go to "Security Settings"
- If necessary, select "Activate PIN", and then enter the current PIN and press "OK". Note: by default, the PIN is set to "1234"
- Select "Change PIN"
- Type in your current "SIM PIN" and select "OK"
- Enter the new SIM PIN and press "OK"
- Re-enter the new SIM PIN for confirmation, and once again, select "OK"
Enabling SIM PIN Protection:
- While viewing the home screen, select "Menu"
- Navigate to and select "Settings" > "Security Settings" > "Activate PIN"
- Type in the password. By default, the password is "1234"
- Select "OK". The message "Phone locked" should appear on the screen
Disabling SIM PIN Protection:
- From the home screen, select "Menu"
- Scroll to and then select "Settings" > "Security Settings" > "Activate PIN"
- Type in your password. Note: by default, the password is "1234"
- Select "OK". The message "Unlocked" should appear on the screen
PUK Code Management
In case you have entered your PIN code incorrectly for several times in a row, then your device will block you from attempting again, until you provide the PUK code in order to unlock the PIN. To get a PUK code you need to:
- Get in touch with T-Mobile Customer Care to request the PUK code
- Enter the PUK code on your device then press "OK"
- Type in the new PIN code and select "OK"
- Re-type the new PIN for confirmation, and once again press "OK"
Related Errors (cases in which you need a PUK Code):
- "PIN code blocked. Enter PUK code"
- "Enter PUK code"
- "SIM card locked. Emergency calls only. Please contact Customer Care"
› See More: T-Mobile 768: Setup Device Lock – Managing PIN, Password, PUK
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