I have the 4s, actually own 3 of them, and I have had this problem since day one. My device connects to WiFi but only delivers a fraction of the available speed. No matter what I change my router settings, which happens to be an Apple Airport latest generation that was released a few months ago, all 3 devices still only have very slow connections. My home network runs great...I have 25 meg service and easily get those sppeds (or close to that speed) on any other device I test. I have an ipad2 and my speed usually shows anywhere from 10 - 20+. All 3 iphones usually test between 1 - 4 megs. Sometimes I can get the iphones to over 15, but then it returns to 1 - 4. I have tried everything I can think of....changed settings, reset settings, moved router, new network, guest network, channels, used N/off N....anyway you get the point. I have cruised the Apple forums and see many people have the same issue with the 4s.....Curious to see if anyone here might have a suggestion on how to get WiFi working on all 3 devices.