I upgraded from an iPhone 4 on iOS5.0.1 (A&T) to an iPhone 4S (Verizon). I know everybody has been talking about the battery issues associated with the iPhone 4S and I think I may have pinpointed what is causing it (for me at least). I noticed today that when I tried to send a medium sized file when the signal strength was poor, I used a LOT of battery power in a short time. I mean A LOT. I know a poor signal will always cause more battery usage, but this was REALLY bad. I used something like 60% of my entire battery in about 1 hour in a location with 1 bar and no 3G service. With my iPhone 4 (AT&T) in a poor signal area (which was pretty much everywhere with AT&T) I never saw that kind of battery drain, even in locations with horrible signal strength I never used more than maybe 20 or 25% battery in an hour. I was just wondering if anybody else has noticed that battery usage when in areas with bad reception is worse than before. I am wondering if this is an iOS 5 issue or an iPhone 4S issue or an iOS5/iPhone4S/Verizon issue.