This Tutorial will show you how to install Android 2.2.1 on your G1 / HTC Dream.
Many Thanks go out to Cyanogen for his great work.

The steps are fairly simple.

If you already have a rooted G1, upgraded recovery, SPL & Radio then just download the file below. Head into your Recovery and flash the .zip file.

For those who are starting fresh Follow the following tutorial: Root & Upgrade your G1.

Then do the following:

Download:

Gapps-mdpi-tiny-20101020-signed (12)
Update-cm-6.1.0-ds-signed (20)

1. Place them on the root of your SD Card.
2. Turn Off Phone
3. Start up in recovery mode by holding Home and pressing Power.
4. Wipe Data (recommend Wipe for a major system upgrade, eliminates any problems)
5. Next, Choose “Flash any .zip”
6. Select Update-cm-6.1.0-ds-signed.zip Flash/Install it. DON’T REBOOT
7. Now Choose “Flash any .zip” again.
8. Select Gapps-mdpi-tiny-20101020-signed.zip

Once it’s done, Reboot your phone.

Enjoy Android 2.2.1 on your G1 / HTC Dream!

This is my full tutorial on how to root and upgrade your G1. This tutorial will show you how to root your phone, upgrade your recovery, upgrade your radio, install the “Danger SPL”, & upgrade your Rom.

@ the time of this posting, the most recent Recovery was AmonRa’s 1.70 and most Recent Rom was Cyanogenmod 4.2.15.1 (There are other versions of CM like version 5 and 6 which you can find in the downloads section)

Prerequisites:

- A G1 / HTC Dream
- Minimum of 1GB SD Card (class 6 is preferable). Backup any files on the SD Card as you will be formatting it.
- About 10-15mins of time and Patience. This is not something you rush through. Please follow each step exactly as written.

Files to Download: (Get them all from G1 Download Section)

This tutorial will teach you how to change the normal G1 Splash screen into a custom splash screen.

Prerequisites:

- Have ADB setup and working properly
- Rooted G1
- You’ll also need Fastboot. Get it from The Downloads Section and place it in your /tools folder if it’s not already there.
- Mac/Linux/Unix Users: Must have ImageMagick installed and setup correctly. http://www.imagemagick.org

Instructions for Windows: