How to unlock GSM iPhone 4S without Jailbreaking

Jailbreaking is not a cup of tea for everyone. For some people it is a tough nut to crack. Locked iPhones are “unlocked” by jailbreaking. Apple does sell unlocked iPhones and other devices but they are more expensive than the locked once.

iPhone 4S not recognizing SIM Cards

First limitations of Siri, then battery drain and now “No SIM Card”. Seems like iPhone 4S related problems are here to stay.