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macrumors member
Original poster
Mar 24, 2012
I have a Sprint iPhone 4S and am content with it. The SIM is already factory unlocked to accept foreign SIM cards. I was considering buying a GPP SIM in hopes to increase the phone's retail value IF I ever sell it (it could then be used on U.S.A carriers.) My question is, is GPP a factory unlock? Or will Apple disable it after every update, sort of like a jailbreak works? If this is the case I wouldn't wang to buy it... Any suggestions? Thank you!!


macrumors 6502a
Jan 10, 2013
The gpp uses apn settings to unlock you phone so apple can patch the gpp unlock, gevey almost always uses jailbreak solution which requires the ios version to be jailbreakable.

Apple Trees

macrumors 6502
May 28, 2013
GPP sim isn't going to increase your resale value as no one wants to use such a frustrating and unreliable method to unlock their phones.
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