Unlocked iPhone

Discussion in 'iPhone' started by rattler, Feb 13, 2012.

  1. rattler macrumors regular

    Jul 18, 2011
    Sorry if this has been asked before, but if I buy an unlocked iPhone 4S to use on T-Mobile, can I switch to AT&T, Verizon, or Sprint later on?
  2. RocketRed macrumors 6502a

    Jan 25, 2012
    If you buy an unlocked iPhone, you can only use it on AT&T or T-Mobile. You cannot use it on Sprint or Verizon because they are CDMA technology, which means they don't use any sort of sim card for phones. All the data is stored on the phone itself.

    With AT&T and T-mobile, they are GSM technology meaning they use sim card for all their phones. In the case of the iPhone 4 and 4S, you will need a micro-sim card. All the data will be stored on the sim card, although you can backup your contacts via iCloud, your computer or the sim card.
  3. eastercat macrumors 68040


    Mar 3, 2008
    Or any other gsm carrier.
  4. Applejuiced macrumors Westmere


    Apr 16, 2008
    At the iPhone hacks section.
    Like they said above.
    An unlocked iphone will work with any GSM carriers sim in the world.
    Not with CDMA providers like Sprint or Verizon for example.

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