Manual Firmware Update on T-Mobile G1 Discovered

While most of the T-Mobile G1 users have got notified on the new Android firmware update (version RC29) on their G1, some users have not receive the OTA update notification and choose to upgrade the firmware manually through a method discovered on xda-developers forum.Note that it is not entirely guarantee that your T-Mobile G1 will be safe from the manual firmware update, some users have also