After 2 weeks of delays, the much anticipated Nexus S 4G update (Sprint only for now, sorry AT&T/T-Mo) to Android 2.3.5 (GRJ90) started rolling out earlier today. If you haven't gotten yours yet but want to apply it immediately to enjoy that nice boost to 4G speeds, among other things, then proceed to our instructions below - you'll be rocking the official 2.3.5 build in no time.


Note: Make sure you're running stock Android 2.3.4, build GRJ22 (the update will likely fail if you're rooted).

  1. Download the update file GRJ90-from-GRJ22 and rename it to (make sure it's named and not if you're using Windows and have it set to hide file extensions).
  2. Move the file to your phone's /sdcard directory using your favorite method - the easiest way is probably mounting the phone as disk using a USB cable.
  3. Reboot your phone and when it starts booting back up, hold Volume Up + Power.
  4. Select Recovery.
  5. The phone will reboot into recovery but first it'll show an exclamation point and a triangle. At this point, mash the Power and Volume Up buttons a few times until the recovery screen shows up.
  6. Select Apply sdcard, which should start the update process.
  7. Reboot and enjoy Android 2.3.5.

What's New

Here are the important bits in this update:

[Update link via Peter Alfonso, more info at xda]