Hey, i just switched to Straight Talk from AT&T and im encountering a few small functionality hiccups on my 4S that seemingly can only be fixed by Jailbreaking my phone. I dislike jailbreaking as a whole. I used to jailbreak every FW but i've had numerous issues that i'd rather avoid discussing. ANYHOW. Some stuff isnt working such as: Facetime (wont activate) iMessage (wont activate) Siri (who cares) MMS (incorrect APN) I know i can fix the MMS w/o JB but the iMessage thing cant be fixed w/o modifying carrier.plist slightly. Im wondering if I jailbreak, edit carrier.plist, then backup via itunes; if i can then unjailbreak and restore the phone from that backup and retain the contents of my edited carrier.plist and thus have functional iMessage on a non-jailbroken 4S. Does carrier.plist survive a restore? Thanks.