Manually Install Android 2.2 On Your Nexus One

[Genuwine1976]

To manually install Android 2.2 on the Nexus One, perform the following steps:

1. Download the official Android 2.2 firmware for the Nexus One here:[HIDE-THANKS]

[Only registered and activated users can see links. ]

[/HIDE-THANKS]
2. Copy the file to your microSD card and name it update.zip (newb warning: not update.zip.zip)
3. Power off your phone.
4. Hold down the VOLUME DOWN button and power it back on.
5. The phone will now search for files like PB00IMG.zip, etc. This is normal. Scroll down to recovery and press the POWER button.
6. When you see the “/!\” symbol, press the POWER button and the Volume Up button at the same time. You should be presented with a menu and one of the options should be “Apply sdcard:update.zip”.
7. Use the trackball to navigate to “apply sdcard:update.zip” and select it.
8. When you see “Install from sdcard complete”, select “reboot system now”.


Edit:

A response from a Google employee to the question of whether users that have manually installed Froyo will also get the final OTA update and whether they have voided their warranties was posted on XDA. The relevant portion reads “When 2.2 (Froyo) is sent via OTA, everybody will get it, including those who have already manually updated to Froyo. No, your warranty is not voided by manually updating to Froyo. But we do recommend waiting for the OTA if you’re still on 2.1 / Eclair.”