How to manually update your Nexus S 4G to Ice Cream Sandwich

So you've got the Sprint Nexus S 4G, and you're well aware that the official Ice Cream Sandwich update is coming. But what if you don't want to wait? The crazy cats in our Nexus S 4G forums have the manual download and install method, and it goes a little something like this:
  1. Download this file from here 
  2. Rename it to (Windows users careful not to get a double ".zip" extension) and place it on your sdcard.
  3. Shut down phone
  4. Boot into bootloader (Volume Up+Power) then from bootloader screen choose RECOVERY (Navigate Vol Up/Down and select with Power).
  5. From stock recovery choose to install
  6. Sit back and relax for a few and you should boot into official Ice Cream Sandwich 4.0.4 !
And that's it. Enjoy, tell your friends

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