I never had problems with my wifi connectivity until i updated it to iOS 5.1.1 and now, when i move away from my router a bit (going out of the room) and it loses the signal!!! Never happend with other iOS.. reseted the router and "forgot" the network , and it worked great for 5 minutes and then went back wrong. tried to reset network settings --> didnt help ( My sister's 4s works just fine with 5.1.1) This is very annoying i must say! How can i resolve it??