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  1. vietkool's Avatar
    Hello,

    friend of my gave me a iphone 4s under sprint network and I'd like to use this phone on GSM network such as T-mobile, straight talk or AT&T. Question is if I have this phone unlocked, does it work on all GSM network ? what I heard the sprint iphone 4s has dual CDMA and GSM network built-in but I wonder how it works
    has anyone try this ?
    2012-09-16 09:12 PM
  2. Simon's Avatar
    You can unlock it with a gevey sim.
    Sprint will actually unlock it too under certain conditions but they only unlock it to work with GSM carriers outside of the US, so it wouldnt help you to use it with ATT or Tmobile. Gevey sim is really your only option.
    2012-09-16 09:16 PM
  3. vietkool's Avatar
    if I use the gevey sim to unlock, what is the down side ? like any service is not function normal such as data? text, video voice. siri etc ... ?
    2012-09-16 09:23 PM
  4. Simon's Avatar
    All that works, downside is you cant update.
    2012-09-16 09:24 PM
  5. vietkool's Avatar
    the sprint phone I just updated to 5.1.1, is it unlockable with gevey sim ?
    2012-09-16 10:36 PM
  6. Simon's Avatar
    2012-09-16 10:37 PM
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