Activate your iPhone back to AT&T if the SIM card you insert after you install blackra1n onto the device doesn't work properly. Blackra1n is a third-party program that "jailbreaks" SIM-bearing iPhones ...

An email was recently sent to us via The Droid Guy Mailbag which reads, “I keep getting the error message ‘SIM card not inserted’ and the phone will only make ...