Hey I bought a 4s after cracking the screen on my 4 was in my friends house he lives 2 doors down from me I was connected to his wifi on both phones , came home and only the iphone 4 would still be connected but the 4s wouldn't be I'd have to move around to catch his signal on the 4s, now I'm currently connected to his wifi on the 4 and the 4s is right beside me and can't find the signal is the 4s wifi signal weaker than the 4 !?