I Can Not Use The Phone,the Screen Says 'enter Puk Code' What Does This Mean?

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Feature Summary (Siemens M46)
...Use AIM® installed on their PC or wireless phone. Feature Summary (Siemens M46) Included Features Clock/alarm Vibrating alert WAP-enabled Built-in modem Phone book Caller ID Security codes... call without saying a word. Optional Services t-zones® R11; Text messaging R11; Send e-mails from your T-Mobile phone to communicate with your family, friends, and co-workers on your phone. AOL® ...
Security (T-Mobile tap)
... from the screen, tap and hold the Lock icon. Manually locking and unlocking the keypad R50; Changing the SIM card PIN code To change the security code, perform the following steps: Scroll to unlock the phone. Enter the new PIN code. 13. 14. 15. Confirm new password Enter the new password again. No password is used to unlock...
Changing the Subscriber Identity Module (SIM) PIN Code (Samsung e335)
... main screen, select Change PIN NOTE : must be prompted to enter the code when you will be enabled. Retype the new PIN and select 9. tm23027 Security (Samsung t639) Security (Samsung t819) The SIM PIN code protects the SIM from being used if it is stolen. If you enable the SIM PIN code, you turn on the phone...