Feeling Brave? Turn your T-Mobile G1 Into The Developer Edition!
If you are jealous of how SIM and lock free the new Dev Phone 1 is, good news is that you can install the very same firmware onto your vanilla T-Mobile G1!
As T-Mobile was unlucky enough to send the all-singing and dancing version to a talented hacker, he managed to reverse the polarity (or something), and now the loader is available for everyone to break their phones with!
This is how you do it:
1. Have root access to your T-mobile G1. Don’t know what that means? This fix is not for you.
2. Download and apply the unlocked bootloader to your phone. You can find those (complete with flashing disclaimer) here!
3. Boot up the handset whilst pressing down the power and camera buttons, and hey presto! The skateboarding Androids mean that you are free to mess around with all of your G1’s innards!
Source: Boy Genius Report