How-to: Setup Device Lock on the T-Mobile 768 – Managing PIN, Password, PUK

Device Lock Settings



Changing the Device Lock Password / PIN:

1. From the home screen, select "Menu"


2. Go to "Settings"


3. Scroll to and select "Security Settings" > "Activate Phone Code"


4. Select "Change phone code"


5. Type in the old password and then select "OK"


6. Type in your new password and select "OK", then retype the new password for confirmation, and once again, press "OK"

Enabling Device Lock:

1. While on the home screen, select "Menu"


2. Scroll to and select "Settings" > "Security Settings" > "Activate Phone Code"


3. Type in the password and select "OK"


4. Enter the password again to confirm, and then select "OK". "Phone locked" should appear on the display

Disabling Device Lock:

1. From the home screen, press "Menu"


2. Navigate to and select "Settings" > "Security Settings" > "Activate Phone Code"


3. Type in the password and select "OK". "Phone Unlocked" should appear on the display

SIM PIN Settings



Changing the SIM PIN code:

1. While viewing the home screen, select "Menu"


2. Navigate to and select "Settings"


3. Go to "Security Settings"


4. If necessary, select "Activate PIN", and then enter the current PIN and press "OK". Note: by default, the PIN is set to "1234"


5. Select "Change PIN"


6. Type in your current "SIM PIN" and select "OK"


7. Enter the new SIM PIN and press "OK"


8. Re-enter the new SIM PIN for confirmation, and once again, select "OK"

Enabling SIM PIN Protection:

1. While viewing the home screen, select "Menu"


2. Navigate to and select "Settings" > "Security Settings" > "Activate PIN"


3. Type in the password. By default, the password is "1234"


4. Select "OK". The message "Phone locked" should appear on the screen

Disabling SIM PIN Protection:

1. From the home screen, select "Menu"


2. Scroll to and then select "Settings" > "Security Settings" > "Activate PIN"


3. Type in your password. Note: by default, the password is "1234"


4. 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:

1. Get in touch with T-Mobile Customer Care to request the PUK code


2. Enter the PUK code on your device then press "OK"


3. Type in the new PIN code and select "OK"


4. 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"

via Forums de téléphone cellulaire (en français) http://cellphoneforums.net/fr/general-cell-phone-forum/t362561-setup-device-lock-on-the-t-mobile-768-%C2%96-managing-pin-password-puk.html