This is a very simple guide to install Android 2.2.
This will unroot your device, revert to stock, and update to FroYo.
Step 1. Download and unzip the original shipping Rom. (I unzipped it to the tools folder so I didn't have to type the full location in the cmd.exe)
http://rapidshare.com/files/3321487...ogle_WWE_1.01.1700.1_ERD79_release_signed.zip
Step 2. Plug in your Nexus One to your computer via USB.
Step 3. Open a Command Prompt on your computer
Step 4. Type adb reboot bootloader. This will boot into the bootloader.
Step 5. Confirm fastboot connection by typing fastboot devices.
Step 6. Erase your Userdata by typing fastboot erase userdata.
Step 7. Erase your Cache by typing fastboot erase cache.
(If step 6 and 7 do not work you can alternately do a factory data wipe within Android. Settings/Privacy/Factory Data Reset)
Step 8. Go to the directory where you stored your unzipped image file.
Step 9. Type fastboot flash userdata userdata.img
Step 10. Type fastboot flash boot boot.img
Step 11. Type fastboot flash system system.img
Step 12. Type fastboot flash recovery recovery.img
Step 14. Fastboot reboot
Step 15. Boot into Android > Settings > About > Update > Download and Install (This should be update-1)
Step 16. Download and copy the following zip to your SD card, and rename it update.zip
http://coblitz.codeen.org/www.romraid.com/paul/nexusone/signed-passion-ERE27-from-ERD79.a487b405.zip
Step 17. Reboot in to the recovery. Power+Trackball > Bootloader > Recovery
Step 18. Press Vol Up+Power
Step 19. Apply update.zip
Step 20. Finish and reboot.
Step 21. Copy the following to your SD card and name it update.zip
http://bit.ly/beSwQm
Step 22. Reboot in to the recovery. Power+Trackball > Bootloader > Recovery
Step 23. Press Vol Up+Power
Step 24. Apply update.zip
Step 25. Enjoy
----------------------------------------
Thanks to,
Football for the Original Shipping ROM link.
RomRAID for the ERE27 Link.
Gu1Dry for FroYo Link.
This will unroot your device, revert to stock, and update to FroYo.
Step 1. Download and unzip the original shipping Rom. (I unzipped it to the tools folder so I didn't have to type the full location in the cmd.exe)
http://rapidshare.com/files/3321487...ogle_WWE_1.01.1700.1_ERD79_release_signed.zip
Step 2. Plug in your Nexus One to your computer via USB.
Step 3. Open a Command Prompt on your computer
Step 4. Type adb reboot bootloader. This will boot into the bootloader.
Step 5. Confirm fastboot connection by typing fastboot devices.
Step 6. Erase your Userdata by typing fastboot erase userdata.
Step 7. Erase your Cache by typing fastboot erase cache.
(If step 6 and 7 do not work you can alternately do a factory data wipe within Android. Settings/Privacy/Factory Data Reset)
Step 8. Go to the directory where you stored your unzipped image file.
Step 9. Type fastboot flash userdata userdata.img
Step 10. Type fastboot flash boot boot.img
Step 11. Type fastboot flash system system.img
Step 12. Type fastboot flash recovery recovery.img
Step 14. Fastboot reboot
Step 15. Boot into Android > Settings > About > Update > Download and Install (This should be update-1)
Step 16. Download and copy the following zip to your SD card, and rename it update.zip
http://coblitz.codeen.org/www.romraid.com/paul/nexusone/signed-passion-ERE27-from-ERD79.a487b405.zip
Step 17. Reboot in to the recovery. Power+Trackball > Bootloader > Recovery
Step 18. Press Vol Up+Power
Step 19. Apply update.zip
Step 20. Finish and reboot.
Step 21. Copy the following to your SD card and name it update.zip
http://bit.ly/beSwQm
Step 22. Reboot in to the recovery. Power+Trackball > Bootloader > Recovery
Step 23. Press Vol Up+Power
Step 24. Apply update.zip
Step 25. Enjoy
----------------------------------------
Thanks to,
Football for the Original Shipping ROM link.
RomRAID for the ERE27 Link.
Gu1Dry for FroYo Link.
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