iOS 5.0 9A334 is better than iOS 5.0.1 9A405 and 9A406?
After upgradingiosversion5.0.19A405and9A406later,myiphonecontinuallylostphone signal.It constantlysays "InvalidSIMcard""nosiminstalled" Everythingwas finefromiosversion5.09A334.Howcan Ireinstalliosversion5.09A334or handlethe error?
I'm using iphone 4S world.
iPhone 4S, iOS 5.0.1