Finally! the wait is over! Google has officially started rolling out the final version of Android 2.2 Froyo update for the Nexus One users. This OTA (over-the-air) rollout will be gradual so don’t panic and wait patiently until the update is available for your phone.

Android 2.2 Froyo

In order to access the update, you will receive a message on your phone’s notification bar. Just download the update, wait for it to install, and you should be all set. This update will be rolled out gradually to phones – and most users will receive the notification by the end of the week . We hope you enjoy these new features.

Those of you who are either rooted, running custom recovery or running one of those custom ROMs will not be notified about this update. You will have to either rollback to the stock FRF50, FRF83 or the stock Android 2.1 update in order to get it officially from Google. If you cant wait, just follow the instructions below to get the update now on your Nexus One, along with optional root access.

Android 2.2 FRF85B on Nexus One

Update using official patch file
You must be running the stock FRF83 release with stock recovery. Copy that file to the root of your sdcard, rename to update.zip, launch recovery (power on with volume down held), press power and volume up when the warning triangle icon appears then select ‘apply update.zip’.
Download: Google

Update.zip to flash with custom recovery
This is the totally stock FRF85B repacked as update.zip. The radio hasn’t changed since FRF50, so if you are using it, you can keep it and install the noradio version.

Download:
– without radio image: Download links (md5sum: 239237c5d59ba14d50ca4c3e614e0e13)

Root
To root FRF85, just flash this update.zip (df9bac43866eb048479fa16fa1b559dd) (contains busybox, superuser.apk, su, unsecured boot.img)

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