PLEASE NOTE! This method is obsolete! Please refer to the newer Rooting/Loading Custom ROM methods on our site:
Unroot (G1) OR Unroot(MyTouch), then Root, then Load a Custom ROM, Apps2SD/Hero etc.

Please check out the “How To: Gain Root Access on the T-Mobile G1″ before reading this post. You must have root access before loading a custom ROM. Click here to be taken to the video. After you have follow the steps in that post you can move on to this one.

Do each of these how to’s in order to get the most out of your G1!

I. HOW TO LOAD A ROM -

1. Find which ROM suits your needs.
Choose one of the following developers to see their latest free ROM:
JesusFreke –
Click Here for Latest ROM

(Find more ROMs at XDA-Developers.com)

2. Download their ROM (always a .Zip file) from their site above.

3. Copy the .Zip file from your computer to the root folder (top most folder) of you SD card in your G1.

4. Rename the .zip file to “Update” (minus the quotes).

5. Disconnect G1 from the computer and turn it off.

6. Turn on G1 by holding down the End key and the Home key AT THE SAME TIME.

7. Once the screen comes up, open the keyboard and hit the Alt key and the S key AT THE SAME TIME.

8. Once update is complete, hit the Home key and the Back key AT THE SAME TIME.

9. Phone reboots and then YOU SHOULD FOLLOW THE HOW TO LOAD A CUSTOM RADIO TUTORIAL BELOW to gain phone functions, bluetooth, and wifi!

II. HOW TO LOAD A CUSTOM RADIO (for better reception, bluetooth, wifi, and data).

1.  Download the latest radio update from HERE.

2. Save it to your computer.

3. Copy the .Zip file from your computer to the root folder (top most folder) of you SD card in your G1.

4. Rename the .zip file to “Update” (minus the quotes).

5. Disconnect G1 from the computer and turn it off.

6. Turn on G1 by holding down the End key and the Home key AT THE SAME TIME.

7. Once the screen comes up, open the keyboard and hit the Alt key and the S key AT THE SAME TIME.

8. Once update is complete, hit the Home key and the Back key AT THE SAME TIME.

9. Phone reboots and you are all done!

10 (Optional). If you want to load a new theme, follow the steps below.

III. HOW TO LOAD A THEME (You must load a ROM first, themes are made for each ROM in specific).

1. Click Here to visit XDA-Developers’ Theme section.

2. Choose a Theme based on the ROM you have (either JF for Jesus Freke or Dude for TheDudeOfLife). Download the .Zip file from the thread to your computer.

3. Copy the .Zip file from your computer to the root folder (top most folder) of you SD card in your G1.

4. Rename the .zip file to “Update” (minus the quotes).

5. Disconnect G1 from the computer and turn it off.

6. Turn on G1 by holding down the End key and the Home key AT THE SAME TIME.

7. Once the screen comes up, open the keyboard and hit the Alt key and the S key AT THE SAME TIME.

8. Once update is complete, hit the Home key and the Back key AT THE SAME TIME.

9. Phone reboots and you are all set!

Reported Issues

None reported…

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