[Update 4]: No need for manual Android 2.2 updates anymore. Official Android 2.2 has arrived and will be installed over-the-air in the next few days. [/Update 4]
[Update 3] FRF85B was not the final FroYo build. FRF91 is. To upgrade from FRF85B, use this link. [/Update 3]
[Update 2] FRF85B is now available for T-Mobile and AT&T Nexus One phones. Looks like FRF85B is the official and final Android 2.2 (FroYo) build. To upgrade from:
After downloading the correct file, follow this procedure starting with step 3 to install the update. [/Update 2]
[Update 1] FRF83 is not the final Android 2.2 build. [/Update 1]
Another Android 2.2 FRF83 update is now available for non-rooted Nexus One. See xda-developers for the discussion of this build. The update procedure is the same as updating from FRF50 to FRF72, with the obvious exception of the update file downloaded in step 2. To pick the correct update file to download, check your current build number: Settings -> About phone -> (scroll down) -> Build Number. If you are running:
Now update your Nexus One similarly to the FRF50 to FRF72 update.
With this update, some protected applications that were “missing” from the Market while running FRF50 and FRF72 now show up in the Market. Does it mean that this is the final Android 2.2 FroYo release? It’s too early to say.