About five people I know who used to complain how awful the AT&T 3G service was on their iphone 3G and 3GS (haven't found any iphone 4 people who switched to 4s) have told me since switching to iPhone 4s on AT&T they haven't dropped a single call and don't have the internet drops in connectivity. All are in major urban areas (NYC, Chicago, DC). I understand the iphone 4s now uses the antenna design required for phones by Verizon (dual switchable antennas spaced far apart) and a new baseband processor. UPDATE: Anandtech reviewed and confirmed the new antenna & baseband system in iphone 4s is improved. http://www.anandtech.com/show/4971/a...att-verizon/16 " The original iPhone 4 design was flawed. Although Apple downplayed the issue publicly, it solved the deathgrip antenna problem with the CDMA iPhone 4. The iPhone 4S brings that fix to everyone. If you don’t remain stationary with your phone in an area with good coverage, the dual-chain antenna diversity introduced with the iPhone 4S is a tangible and significant improvement over the previous GSM iPhone 4. In North Raleigh, AT&T’s coverage is a bit on the sparse side. I get signal pretty much everywhere, but the quality of that signal isn’t all that great. The RSSI at my desk is never any better than -87dBm, and is more consistently around -94. Go down to my basement and the best you’ll see is -112dBm, and you’re more likely to see numbers as low as -130 thanks to some concrete walls and iron beams. The iPhone 4’s more sensitive cellular stack made it possible to receive phonecalls and text messages down there, although I couldn’t really carry on a conversation - particularly if I held the phone the wrong way. By comparison, the iPhone 3GS could not do any of that. The iPhone 4S’ antenna diversity makes it so that I can actually hold a conversation down there or pull ~1Mbps downstream despite the poor signal strength. This is a definite improvement in the one area that is rarely discussed in phone reviews: the ability to receive and transmit a cellular signal. The iPhone 4 already had one of the most sensitive cellular stacks of any smartphone we’d reviewed, the 4S simply makes it better. Performance at the edge of reception is not the only thing that’s improved. If you’re on a HSPA+ network (e.g. AT&T), overall data speeds have shifted upwards." Please only vote if you have found AT&T 3g service poor in your area AND you're an iphone 4s user now. If you're now using an iphone 4s on AT&T, could you please report 1) Do you find significant reliability improvement (far less dropped calls and internet timeouts) with the 4s? 2) What area of the USA do you use the iphone 4s? 3) Which iphone model did you have before the 4s?