Use GSM Straight Talk Service on Unlocked CDMA iphone?

Discussion in 'iPhone' started by Sunsean, Jun 5, 2012.

  1. macrumors 6502

    Joined:
    Mar 27, 2012
    #1
    As title suggests, can you use an unlocked CDMA iphone on a Straight Talk AT&T SIM?

    Just bought an unlocked 4s thinking it would work, but can't get the SIM to take...is it possible?? Thanks for any help
     
  2. Daveoc64, Jun 5, 2012
    Last edited: Jun 5, 2012

    macrumors 601

    Joined:
    Jan 16, 2008
    Location:
    Bristol, UK
    #2
    Verizon and Sprint will only allow a phone purchased from them to be used on their network.

    The only type of unlock that they offer is an "international" unlock, allowing you to use a non-US SIM in the phone.

    As such, I don't think that you'd be able to use a US carrier's SIM in the iPhone.

    I'm not sure about iPhones sold by smaller CDMA carriers.

    Do you know which carrier the phone was locked to?
     
  3. thread starter macrumors 6502

    Joined:
    Mar 27, 2012
    #3
    It was a Verizon phone, unlocked with gevey sim method. Guy I bought it from was using a TMO sim (gsm) so I thought it'd work. Major my bad moment. It's weird, I got the phone to read the sim and even got data working, but couldn't get SMS to work...oh well, guess no choice but to resell and try to get my $ back :-/
     
  4. thread starter macrumors 6502

    Joined:
    Mar 27, 2012
    #4
    Just in case anyone wanted to know - this IS possible with the new gevey sim ultra s unlock. I have a Verizon 4s working with my straight talk service right now :)
     
  5. macrumors 601

    Joined:
    Feb 9, 2011
    #5
    Nope. Read the post above yours again. Sprint and Verizon will only unlock for international use. They don't use Gevey which is an entirely different unlock method (helps to include such details in your OP).
     
  6. thread starter macrumors 6502

    Joined:
    Mar 27, 2012
    #6
    That's what I'm saying, though - that post was wrong. It is a Verizon phone, unlocked by a new Gevey sim called Gevey Ultra S unlock. CDMA phone unlocked to work with American GSM (i.e. Straight Talk). I have it up and running 100%, voice, 3g data, sms, mms, iMessage, etc.
     
  7. macrumors 601

    Joined:
    Jan 16, 2008
    Location:
    Bristol, UK
    #7
    My post was referring to official unlocks.

    A "Gevey SIM" is a device that you put into a locked iPhone.

    Your post was misleading because you said that you bought an "unlocked CDMA phone", not a locked phone with an unlocking device.

    If you take the Gevey SIM out of the device, it'll be locked.

    If you update the device, the Gevey SIM may stop working.
     
  8. thread starter macrumors 6502

    Joined:
    Mar 27, 2012
    #8
    Gotcha, I see the distinction now, sorry. Yes, it is only unlocked via the Gevey sim, without it it's just a Verizon phone. Sorry about the poor wording. Aware of the update issues, will probably be screwed when io6 drops :-/ At least until they figure it out (if they do). For now it is working, thinking about selling it and buying a regular AT&T version...plus I think with an AT&T model I would get faster speeds (HSPA+). Unsure though because it is working flawlessly right now.
     
  9. macrumors newbie

    Joined:
    Jul 17, 2012
    #9
    Going to attempt...

    I have a Verizon blacklisted IMEI iPhone 4s and understand I cant use it on Verizon...what Gevey Sim Ultra S unlock SIM would I need to get in order to use it on Straight Talk? The ultra S GSM or Ultra S or CDMA? Any possible issues I might come across?
     
  10. macrumors newbie

    Joined:
    Oct 11, 2012
    #10
    yo how did you get the verizon to work with straighttalk? can you pm me if you get a chance man im trying to get a cdma working with straightalk too and im having trouble
     
  11. macrumors regular

    Joined:
    Jun 9, 2007
    #11
    the iphone 5 will work, but I guess that really doesn't help you.
     
  12. macrumors newbie

    Joined:
    Dec 15, 2012
    #12
    Using Verizon CDMA HTC Incedible with Straight Talk

    My daughter wants to give me her old phone. Can I carry that phone into Walmart and get it set up for the Straight Talk pre-paid plan for unlimited everything for $45 per month? TIA
     
  13. macrumors Nehalem

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #13
    This is an iphone forum.
    You're asking us about a verizon HTC Incredible?
     
  14. macrumors newbie

    Joined:
    Dec 15, 2012
    #14
    She has an iphone now, does that count? Sorry, please point me in the right direction.
     
  15. macrumors Nehalem

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #15
    Lol:D
    Hey as long as she's using an iphone now:D
    I wish I had any clue if the verizon HTC Incredible can be unlocked for GSM use.
    Does it even have a sim slot? Can verizon or another 3rd party seller unlock it?
    Maybe others here know more.
     
  16. macrumors 6502a

    Joined:
    Nov 11, 2010
    Location:
    Parts Unknown
    #16
    The original Incredible was not a world phone. CDMA only radio so no SIM card slot.
     

Share This Page