Nexus S 4G Jelly Bean [Official] [ Download]
Just got jb pushed to my phone. So far it is pretty sluggish. It acts like the phone is currently busy all the time. Maybe it just needs to do an initial scan? I hope so.
Fyi, just requires two reboots to complete. It forces the first one and runs like crazy until you do you own second restart. The second restart updated more os settings and now it runs better.
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