Carrier, on request, will unlock mobile wireless devices within one year of the initial activation, in accordance with reasonable time, payment or usage requirements. Until recently, if you wanted to unlock your phone to switch carriers, there was a good chance that you would have to do it without collaborating with the media as you were. The IMEI code is also engraved on the backside near the bottom in the case of some iOS devices like the iPhone 5 and the original iPhone or engraved on the SIM card pocket for the iPhone 3G, iPhone 3GS, iPhone 4 and iPhone 4S. Facial Animation Software. When you can successfully call with SIM card from another mobile phone provider is unlocked phone. However, if this is not possible, the phone is locked by your wireless service provider and you must talk to your wireless service provider about whether you can unlock the phone. Open iTunes on Mac or PC, and make sure you have an Internet connection. 2. Connect the iPhone to the USB cable that came with your iPhone using the Dock Connector. Unlock Iphone 4 Three Best Screen Recording Software. on this page.