T-Mobile G1 Phone Seems to be enjoying privilege of having Google Android which intern uses Linux version 2.6. Recently we have seen several news of google android having several security bug in original RC19 build and then later T-mobile pushing RC29 updates which got one more high severity bug ability to root on your G1 Phone.

This forced Google to stop pushing RC29 updates and come up with RC30 fixing G1 phone root and reboot bug .However G1 phone owners are happy with RC29 but can’t get rid of annoying update message for RC30. Here is some thing great news for those G1 Phone users who want to enjoy RC29 features and want to get rid of Annoying message, A RC30 Mod v1.2 Firmware which is available for downloaded Thanks to Saurik.

Features of RC30 Mod v1.2 Firmware for G1 Phone

- adb shell now works in recovery mode

- a real su (instead of the setuid copy of sh in the last version)

- lots of new goodies in /system/xbin and /system/modules

- Changed the init.rc so that it will include /system/init.rc and /data/init.rc, so you can easily add new startup stuff, without having to rebuild/reflash boot.img

- Changed the boot-up recovery flash to look for a file at /data/recovery.img instead of /system/recovery.img, and also to delete recovery.img after a successful flash

- changed the “mount” symlink to be busybox’s mount instead of toolbox’s mount

- added an /etc/fstab file that busybox’s mount can use, that lists the standard system partitions.

- changed the fingerprint back to the official RC30 fingerprint (don’t want to let google know you’re using a modified build)

- using a newer version of busybox

- moved busybox from /system/bin to /system/xbin

Apart from this it also includes featuresof v1.0 and v1.1

How to Install RC30 Mod v1.2 Firmware on G1 Phone

1. Download and Rename update_TC4-RC30_full_xda-dev_v1.2.zip to update.zip.

2. Place this file on your sdcard (don’t forget to remove sdcard connect to USB of your computer)

3. Turn off your G1, then turn it back on by holding the Home+End keys until you see an icon popup after the T-Mobile G1 logo.

4. From the icon screen, open the keyboard and hit Alt+L. This will display the log saying what is happening (although you can skip this step).

5. Now press Alt+S to begin the update. Remember, the update needs to be in the root of the Micro SD card and needs to be named update.zip.

6. Once it finishes, just follow the onscreen instructions and press Home+Back to finish.

7. The G1 will reboot a few times to flash different parts of the firmware.

Incase if you have already updated RC30 on your G1 phone then you need to revert back to RC29 to apply RC30 Mod v1.2 Firmware

Download Link Rc30 Mod v1.2 Firmware

Download RC30 Mod v1.2 Firmware for G1 Phone.

Mirror Link: Download RC30 Mod v1.2 Firmware for G1 Phone.

Source: Android-Unleashed