I will help to unlock the T-Mobile G1.You can unlock the Mobile Phone from the Network lock using the unlock code,You can get the Unlock code at low cost from the site
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T-Mobile G1 Unlocking Instructions
phones. If you enter over a certain amount of wrong unlock codes on your mobile phone, your phone may get hard locked and sometimes become unusable.
1. Switch ON your T-Mobile G1 with a
Not ACCEPTED SIM Card.
2. If your T-Mobile G1 asks for a PIN code, then enter your SIM card PIN and press OK.
3. T-Mobile G1 will ask to enter an "unlock code".
4. Enter Unlock Code we send to you.
5. Your T-Mobile G1 is now unlocked.