Tag: firmware

How to : Root T-Mobile G1

You bought the latest and the hottest gadget in the market, the Android powered T-Mobile G1 with high hopes. But, you found that there are many things, some very essential and basic functions like taking screenshot, which you cannot perform? If the answer to the question is “YES”, then you have landed at the right place.

All you need to do, is follow some steps carefully and root your device to reveal the true potential of the great device. But, perform these steps at YOUR OWN RISK, as a slightest mistake could brick your device forever.

You need to have firmware version RC 29 (for the US users) or RC 7 (for the UK users). If you have RC 8 or higher (for the UK users
) or RC 30 or higher (for the US users), you need to downgrade to firmware version RC 7 or RC 29 before proceeding to gain root access. To know how to downgrade your firmware version, click here.

The steps that need to be followed are :

  1. Download recovery.img and Hard SPL to the root of your SD card. Click here to download recovery.img and click here to download Hard SPL.
  2. Restart your device. Then, press Enter twice, and type “telnetd” and press Enter again.
  3. Download and install a Telnet application on your device.
  4. Type the following commands into the application :
  • mount -o rw,remount -t yaffs2 /dev/block/mtdblock3 /system
  • cd sdcard
  • flash_image recovery recovery.img
  • cat recovery.img > /system/recovery.img

Congratulations !! now you have root access on your T-Mobile G1.

July 2, 2009 | 1 Comment More

How To : Downgrade or Upgrade the firmware (RC) version on T-Mobile G1

There are many occasions when one needs to downgrade/upgrade the firmware version on his/her T-Mobile G1. For example, to get root access on your G1, you need to have RC 29 (for the US version) or RC 7(for the UK version). But, if you have a device with a higher firmware, you need to downgrade to RC 29 or RC 7.

Here are the steps that you need to follow. But, perform these steps at YOUR OWN RISK, because if something goes wrong, your phone can be bricked forever.

  1. Use a micro SD card, that has been formatted with FAT 32 mode.
  2. Download the firmware version you wish to install. Rename the downloaded zip file to update.zip. Place the file in the root folder of your micro SD card, and put the card in your device.
  3. Turn the device power off.
  4. Keep the Home+End button pressed until you see the T-Mobile G1 logo.
  5. Now, press Alt+L on your keyboard.
  6. Now, press Alt+S to begin the update process on your device.
  7. Carefully follow the instructions on your screen. Then, press Home+Backspace button to finish the process.
  8. Your device will reboot a few times, to completely flash your device with the new firmware.

To check, if your new firmware has been flashed, go to Menu > Settings > About Phone. Scroll down to the Build Number. If it reads the firmware you just flashed, then the update has been performed correctly.

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June 27, 2009 | 2 Comments More