Updating tmobile g1 software
On your G1, everything you type on your keyboard is also being run in a hidden console with root permissions. Note: There are 2 ways to install the test keys, one is from the SD card and the other one is using ADB (from the android SDK).
I recommend using the SD card method because this is easier for non-developers.
Move the to the SD card, in the main directory, not within a folder. When rebooting, hold Power and Home and you will restart in Recovery Mode.
There should be a small logo on your screen that shows the phone next to a large exclamation point. Hit Alt S to begin the update process off the SD card.
This update wont overwrite your OS (Bootloader and OS are two separate parts) If you want to revert to the original G1 bootloader, use the file attached in the XDA topic. If you are unfamiliar with the different types of firmwares, I recommend to use either the Official ADP firmware (1.5) from HTC or a customized firmware made by Jesusfreke.
If you’re upgrading to a new firmware, be sure to apply the radio update before the system/recovery image.
General instructions for updating to a new firmware (Outdated, new Jesusfreke firmwares are available) Its now time to install the custom firmware.
Currently there are three flavours available: If you are a normal user that wants to have root access, install RC8.
The reason for installing RC29 is that this version has a flaw that treats anything you type as if it was typed into the Terminal. If the update you applied failed, you most likely would be at the "android" boot and it would just loop, or you'd have a black screen.If your system can not extract compressed files, then you can simply rename the files to Free 7-Zip software can extract and compressed files if needed – – Before connecting the device (strobe or radio trigger etc) to your computer via a PC sync cord, its important to make sure the flash or trigger is turned OFF first. Its also important to follow Godox’s instructions on draining any remaining power from the device where needed, before connecting to the computer – Godox use various methods to access and display the firmware version currenly installed on their flashes and radio triggers – X1T – Turn device OFF.