Nexus One being Google branded Android phone with stock firmware support, makes it easier to provide new updates and firmware to Nexus One. Nexus one is the only android phone which receives updates before any other Android phones. It seems a new update of size 3.9 MB being rolling out to Nexus One which updates the firmware to Android 2.2.1.
No details on changes is available as of now and looking at size of update it looks some minor update. So if you running stock Android 2.2 (build FRF91) version and becoming impatient of waiting for OTA update then follow below guide to manually update Android 2.2.1 on Nexus One.
How to Manually Update Android 2.2.1 on Nexus One
1. Download Official Android 2.2.1 Update.
2. Copy above downloaded file on the root directory of microSD card and rename to update.zip
3. Now power off your phone.
4. Boot your device in recovery mode by holding the trackball and pressing the power button.
5. You’ll be booted into a white screen with three Android robots on skateboards. Select “Bootloader.”
6. On the next screen, select “Recovery.”
7. Now Nexus One phone will reboot, giving you a picture of the Android robot and an exclamation point inside a triangle.
8. Now press the power button and volume up button at the same time. It could take a couple of tries.
9. Now using the trackball choose “Apply sdcard:update.zip” and let things run their course.
10. When you see “Install from sdcard complete”, select “reboot system now”.
Now enjoy your Nexus One with Android 2.2.1. Let us know if you face any issue or find any changes. This update can be applied to any Nexus One model running on Android 2.2, Build FRF91.
