Stuck with one carrier with your new superphone? Not for much longer, at least, if you're using the I9300 version of the Galaxy S III and are willing to dabble with some rooting. The app is free, but requires said root access, unlocking your phone baseband and opening up the device to any and all (radio-compatible) SIM cards. Its creator, Supercurio, ensures us that important data is backed-up before the operation, although an automatic restore option isn't yet included in the beta version. Unlock the SIM-swapping potential by hitting up the source below.
Samsung Galaxy S III