For those of you looking for the latest Android 4.1.2 on your rooted Nexus S 4G, there is a CWM-flashable 4.1.2 ROM you can flash. Built by XDA user cteneyck, this Android 4.1.2 is going to be very close to the official Android 4.1.2 as its built from sources. Everything seems to be working fine out of the box including 4G so this could be the way to get Android 4.1.2 before the official release on your Nexus S 4G.
Try out this Android 4.1.2 and let me know what you think, I think Android 4.1.2 has gotten impressively smoother and faster.
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