The T637 is a model of cell phone manufactured by Sony Ericsson, a UK-based telecommunications company. The phone includes a camera, FM radio, email client and Bluetooth connectivity. Information stored on the T637 and its SIM card are protected by the phone's built in security features. The SIM card lock protects information on the SIM card, like telephone numbers and messages while the phone lock protects data such as pictures and video. Unlocking the SIM card or phone will require one of two numeric codes.
Instructions
Unlock Sony Ericsson T637 SIM Card
1. Switch the T637 off then on again using the "Power" button on top of the phone. A "PIN" request screen will appear if your SIM card is locked.
2. Enter your SIM PIN using the number keys. Your SIM PIN was supplied when you purchased your phone. Be careful as you type, your entries will appear as asterisks.
3. Press "C" if you make a mistake. If you enter the wrong PIN three times the SIM card will be blocked. See Tips for more information.
4. Select "Yes." The SIM card will unlock with the correct code.
Unlock Sony Ericsson T637 Phone
5. Switch the T637 off ,then on again using the "Power" button on top of the phone. A "Phone Locked" screen will appear if your phone lock is active.
6. Enter your lock code using the number keys. The default code is "0000." Be careful as you type; your entries will appear as asterisks.
7. Press "C" if you make a mistake. See Tips for more information.
8. Select "Yes." The phone will unlock with the correct code.
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