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1. Download the 645kb update file from Google
   (signed-passion-FRF83-from-FRF72.684bd56a.zip)
2. Follow the instructions here – Upgrading the Google Nexus One Eclair 2.1 to Froyo 2.2 – unrooted stock
   (note that step 9 may require you to press reboot )

To force your Google Nexus One to “phone home” for updates all you need to do is open the phone keypad and dial the following number

*#*#2432546#*#*

The number translates to

*#*#checkin#*#*

This will contact Google and check for updates and respond with a “checkin succeeded”

The release version of Froyo 2.2 has been released for Google Nexus One users.

1. Download the 1828kb update file from Google
   (filename:  signed-passion-FRF83-from-FRF50.38d66b26.zip)
2. Follow the instructions here – Upgrading the Google Nexus One Eclair 2.1 to Froyo 2.2 – unrooted stock
   (note that step 9 may require you to press reboot )

An update for Froyo 2.2 from FRF50 to FRF72 has been released and is available from Google’s website now.

The update is similar to the Eclair 2.1 to Froyo 2.2 with one change.

1. Download the 1.9mb update file from Google
   (signed-passion-FRF72-from-FRF50.bc033f9e.zip)
2. Follow instructions here –  Upgrading the Google Nexus One Eclair 2.1 to Froyo 2.2 – unrooted stock – starting with step 2 and returning her after step 9.
3. The phone when complete will sit there with the same menu seen in step 8. Press the trackball to reboot.