Updating g1 phone
It was already received by the limited number of users, thus, it while test release.
T-Mobile G1 Unfortunately, in this updating does not contain yet an update of platform Android code-named Cupcake of which with such impatience is waited by users of the smart phone and which should bring very many new possibilities.
That’s why we’ll explain how to upgrade your T-Mobile G1. It allows your device to be up-to-date, and run more smoothly.
All you need is a Micro SD card to update to the new RC29 firmware.
You could also install a version of Cyanogen Mod on the device, I believe that allows you to use wifi to authenticate.
If you have any question about doing this, don’t even try it.
The Android operating system for smartphones and tablets gets periodic system updates just like Apple's i OS for the i Phone and i Pad.