Help How to manually install Android 2.2 on your Nexus One

[umikun]

How to manually install Android 2.2 on your Nexus One

Apparently at some point last night a very select few Nexus One owners started getting the Android 2.2 update OTA. So if patience is one of your major virtues you should feel free to hold out for that update notification to hit; if on the other hand you would rather just go ahead and get your Froyo on now just follow the directions below.

Note that this has only been reported as working for T-Mobile users so far and if you are currently rooted you should get yourself back to stock before running the update.

click here for full procedure

 

[furiannn]

So this new update to download is the actual Froyo that Google will be OTA'ing? Can I update the existing 2.2 that I manually updated to last week with this file or do I need to go back to stock?

How do I get back to ERE27?

 

[umikun]

This is a tutorial to restore the Nexus One ROM to Original Shipping Image

I am assuming you know how to use ADB and Fastboot as well as some basic OS knowledge be it DOS, OSX, or Linux.

This will do the followings to your Nexus One:
1. Reset your system files to the original system files.
2. Reset your kernel/boot image to the original shipping boot image.
3. Reset your recovery to original recovery (if you wish).

This will not relock your Nexus One. Once you unlock your phone, you are stuck for now.

This is for those of you who decided to flash a few different ROMs and want to restart from scratch.

As before, if you mess up your phone or your computer, you are on your own. I take no responsibility on what you do with your phone or your computer.

Step 1. Disable backup my settings under privacy settings.

Step 2. unzip the original shipping ROM and put it somewhere you can find.

Step 3. Plug in Nexus One with USB to computer (enable usb and debug modes)

Step 4. adb reboot bootloader (which will boot into the bootloader)

Step 5. Confirm fastboot connection fastboot devices

Step 6*. fastboot erase userdata

Step 7*. fastboot erase cache

*If step 6 and 7 does not work, and if you have Amon_RA's recovery installed, you can do a factory data wipe from there.
Alternately, you can also do a factory data wipe within Android. Settings => Privacy Settings => Factory Data Reset.
Thanks to Brian and setzer715.

Step 8. Go to the directory that you stored your unzipped files.

Step 9. fastboot flash userdata userdata.img

Step 10. fastboot flash boot boot.img

Step 11. fastboot flash system system.img

Step 12. Skip to step 13 if you want to keep recovery (assuming you have a modified recovery such as Amon_RA's recovery). If not fastboot flash recovery recovery.img

Step 13. fastboot reboot

Step 14. After the system boots up and while setting up skip setting up with the google account and you can setup accounts later. This will prevent the phone from pulling down the previous settings (downloaded apps, wallpaper etc) from google.

Step 15. You are done. Enjoy.

 

[furiannn]

Thanks for the tutorial, not sure Im ready to potentially brick my n1!

 

[Tatsumaru]

This update works great thank you!! 2.2 all the way