CONVERT T-MOBILE G1 INTO ANDROID DEV PHONE

First of all you need to download ‘Unlocked Boot Loader’ file.

Download Link:

http://www.modmygphone.com/files/EngBootloader_v2_NoSigCheck.zip

After you have downloaded the *.zip file then follow these steps.

1. Rename the “EngBootloader_v2_NoSigCheck.zip” file to “update.zip”.
2. Copy the renamed file to MicroSD Card root directory.
3. Restart the handset by holding down the “Power” and “Home” buttons simultaneously
4. When you see the triangle logo (you’ll know it when you see it), hold press “Alt” and “L” simultaneously.
5. Ensure that you see “using test keys” along the top.
6. Press “Alt” and “S” simultaneously.
7. Follow the on-screen instructions.
8. Press “Home” and “Back” buttons simultaneously when you’re done and ready to reboot.
9. The G1 will reboot as it does its thing – let it do so.
10. You have now unlocked your T-Mobile G1 to work just like an Android Dev Phone.

Note:

‘Alt’, ‘L’, ‘S’ keys you will find out in your T-Mobile G1 keyboard.

Source:

http://www.ubergizmo.com/15/archives/2008/12/diy_android_development_phone_1.html