Fix “No SIM Card Installed” Error on iPhone 4S by Installing iOS 5.0.1 Build 9A406
The recently released iPhone 4S specific build of iOS 5.0.1 resolves an ongoing SIM card issue that was effecting some users. The issue would cause some iPhone 4S’s to not recognize a SIM card, with the iPhone reporting a “No SIM Card Installed” or “Invalid SIM” error message, in addition to the phone not connecting … Read More

