I anyone else having problems since upgrading to System version 2.3.340. I am not sure if the two are connected, but I upgraded last night and I have had a few problems today that I haven't had since I got the phone about 10 days ago. My bluetooth would not turn on, I have lost 3G coverage multiple times, my apps would not update when I forced them(I have auto updates turned off). All problems were rectified after power cycling the phone. Does anyone know how to revert to the previous System? Thanks in advance for your help.