Some Nexus One owners began receiving another update for Android 2.2 (now at build number FRF85B). The update is being sent out over-the-air to users with the last build FRF83, but some AT&T users on the older Android 2.1 EPE54B also reported they received the latest firmware.
I think that since the AT&T and T-Mobile versions are both receiving the same build number, there could be a chance this is the final version. Most of the previous updates were incremental versions, but this is the first one to go from Android 2.1 to the latest version of Android 2.2.
The best way to upgrade your Nexus One to the latest firmware build is to just check for it. Browse to Settings > About phone > System updates and you should receive a notification to download the update.
If you want to manually install it, grab the correct file below.
- To go from FRF83 to FRF85B download this file, rename it update.zip and flash it.
- To go from EPE54B to FRF85B download this file, rename it update.zip and flash it.
To manually install Android 2.2 FRF85B on the Nexus One, perform the following steps:
- Download the official Android 2.2 firmware for your current build (see links above)
- Copy the file to your MicroSD card and name it update.zip (Pro tip: not update.zip.zip)
- Power off your phone.
- Hold down the VOLUME DOWN button and power it back on.
- The phone will now search for files like PB00IMG.zip, etc. This is normal. Scroll down to recovery and press the POWER button.
- 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".
- Use the trackball to navigate to "apply sdcard:update.zip" and select it.
- When you see "Install from sdcard complete", select "reboot system now".
Let us know if you notice any differences. I've only had it installed for a couple hours and I have seen no major changes yet. The change log states it brings updates to the browser for Flash, support for Exchange in Calendar, a speed boost, and tethering options (all of which have been available in earlier builds).