Credit to Fabolous @
Download this file:
https://android.clients.google.com/u...6.fa406da6.zip <--- Direct from Google's Servers!
Put on the root of your sdcard (not in a folder)
Rename to update.zip
Power phone off
Boot into recovery (power phone on while holding down x)
When you see the triangle with the exclamation point, press (& hold) the volume up key and camera button key (only press the camera key down half way)
Navigate to “apply update.zip” and press the gold center button on the keyboard to select it. It will start the update process
If your installation is 'aborted', it's probably because you named the file update.zip in Windows, which results in a file called update.zip.zip. Try renaming it to just 'update'
EDIT: You can do all this from your phone without using the USB cable.. Using Astro just move the file from your download folder on SD, to the Root of SD..
Installing this will remove root access! It will kill wifi tethering. It ONLY installs over 2.01 and all of your apps/ personal info will remain untouched.
If your phone's Firmare Version reads "2.1-update1".. You're done! Congrats! Everything is fine!
Special Thanks To...
-ugot2go123 and Speeddymon for the update.zip file