Hello. I have iPhone 4 Factory Unlocked on 4.2.1 (tethered Jailbreak). I attempted to use MakeItMine and FakeCarrier from Cydia, however it won't work in changing the carrier name in the upper left. I'm on a non-ATT carrier, but that shouldn't matter, when I put in an AT&T SIM it doesn't change the carrier name either. Are the above-mentioned apps not 4.2.1 compatible or am I missing something here? Any alternative way of doing it?