I finally set a genius appt for this afternoon for a replacement. I was VERY hesitant to do this as I have not had any other major problems with this phone. I have one tiny speck of dust under the screen, but it's not in a bothersome place, no issues with my proximity sensor, etc. My reason for requesting replacement is that my phone is dropping calls ALOT and in places where my husband's iPhone 4 performs without a problem. We both use a bumper. I kept thinking it was something I may be doing, but it is becoming quite a bit more obvious with time. I've also had problems with 3G data that he hasnt. I know they are not doing replacements for reception issues, but this isn't a "death-grip" issue at all... Should I expect problems getting a replacement? I cant exactly re-create the problem there... Can they check diagnostically to verify my dropped and call failed problem? Thanks for any help/advice.