There is a problem!!!! Wireless reception is much worse after the update iOS 5.1.1. See this thread too: https://discussions.apple.com/thread/3938559?tstart=0
It is already generating a lot of angry people!!!! And I am one of them!!! Why can't Apple programmers have a decent product ... something always happening ... what is wrong with R&D department? Here is the solution, hire whole bunch of teenagers in high school or colleges, give them free phone, tell them play around with it, and tell us if anything is wrong with this phone! Call me crazy, but product needs to be up to the everyday use standard! and if it is not, no matter how great is your phone, you loose even loyal customers! And … I get that you are trying to be the innovative leader in mobile electronics department!
I have iPhone 4S and I like it, but if this is going to continue, I might switch to something else more reliable! P.S. I’m not an Apple product person, so it is very easy for me to switch over to something else.
Apple R&D folks, please have a fix soon!!!
Just found this one too: https://discussions.apple.com/thread/3938559?answerId=18396562022#18396562022