How to root & install a custom ROM on the AT&T Nexus S running Android OS 2.3.4 (Windows or Ubuntu 11.04)

I grabbed one of the free Nexus S phones that Best Buy was giving away, and since for my last phone I was too far into using it before I thought about rooting, I wanted to be sure to start this one off right, so I literally rooted before I even put the sim card in. This was my first time rooting, so I still had to synthesize the method from a bunch of sources, filter out the sketchy sounding “download my super cool ROM from my .ru server and you’ll get 8 times the battery life” posts, and fill in the gaps with educated guesses. The actual process itself is really simple, looking back at it. This basic process will probably work for most Android phones if you get the right recovery image and ROM for your phone. Continue reading