Activating new 4s with a working foreign SIM?

Discussion in 'iPhone' started by boomasta, Oct 14, 2011.

  1. boomasta macrumors newbie

    Joined:
    Oct 6, 2011
    #1
    Hi Lads and Gents,

    this just dawned on me so please bear with me... i have searched the forum but could not find a definitive answer.

    I have an unopened iPhone 4S.. and I was wondering if i pull out the original ATT sim and put in my foreign (working) sim, what would happen? Would I not be able to activate? or perhaps worse, lock my phone to the foreign carrier?

    Any input is appreciated..:D
     
  2. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #2
    It wouldn't work. AT&T iPhones can only be used with AT&T SIM cards.
     

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