Carrier T-Mobile iPhone 6S PLUS not unlocked for AT&T? Help

Discussion in 'iPhone' started by ansabakhan, Mar 25, 2016.

  1. ansabakhan macrumors 65816

    ansabakhan

    Joined:
    Mar 3, 2010
    #1
    I bought a iPhone 6S plus on ebay which was listed as a T-Mobile iPhone..... my understanding is all t-mobile iphones work with AT&T. However while the iPhone I received do work with Tmobile it keeps giving me "invalid Sim" error when I try AT&T sim...

    the model on this phone is: NKU62LL/A

    Can any one please help me figure this out ? I need to use this phone with att

    Thanks in advance !
     
  2. Chatter macrumors 6502a

    Joined:
    Jun 10, 2013
    Location:
    Uphill from Downtown
    #2
    All TMo phones (like others) will work with ATT - IF THEY ARE UNLOCKED.

    You bought a phone that is locked to Tmo. You can reach out to Tmo and ask them to unlock it. But as of now, it sounds like you have a perfectly functioning phone locked to the original network.
     
  3. gurase macrumors regular

    Joined:
    Oct 12, 2015
    #3
    The original owner most likely purchased the phone from a T-Mobile store, where they are locked to T-Mobile. The T-Mobile model that Apple directly sells is unlocked.

    Try contacting T-Mobile or the seller to see if you can get it unlocked or returned.
     
  4. ansabakhan thread starter macrumors 65816

    ansabakhan

    Joined:
    Mar 3, 2010
    #4
    Tmobile phone are locked too ? I never knew that .... I thought all Tmobiles phone are unlocked.. also I cant find any info on this model NKU62LL/A any where
     
  5. AutoUnion39 macrumors 601

    AutoUnion39

    Joined:
    Jun 21, 2010
    #5
    You're confusing Tmobile for Verizon.
     
  6. ansabakhan thread starter macrumors 65816

    ansabakhan

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    Mar 3, 2010
    #6
    my understand was that all Tmobile iPhones are unlocked for AT&T ?
     
  7. AutoUnion39 macrumors 601

    AutoUnion39

    Joined:
    Jun 21, 2010
    #7
    No. Only if they were paid for in full and an unlock was requested.

    If you're under a payment plan, they stay locked
     
  8. ansabakhan thread starter macrumors 65816

    ansabakhan

    Joined:
    Mar 3, 2010
    #8
    ohh didn't know that ! do they unlock Tmobile iPhone on ebay like that do for AT&T ?
     
  9. cousintim macrumors 6502

    cousintim

    Joined:
    Jan 14, 2015
    #9
    iPhones with a T-Mobile iPhone SIM purchased from Apple are unlocked. Those purchased from T-Mobile are locked.

    T-Mobile has a very lenient unlocking policy that allows customers to contact T-Mobile after 40 days and request an unlock. It requires that the iPhone is paid in full and you didn’t agree to any sort of promotion, such as an Early Termination Fee payoff for switching from another carrier.
     
  10. ansabakhan thread starter macrumors 65816

    ansabakhan

    Joined:
    Mar 3, 2010
    #10
    what is the easiest way to unlock a locked iPhone?
     
  11. iDuel macrumors 6502a

    iDuel

    Joined:
    Jul 20, 2011
    Location:
    Greece/USA
    #11
    The only way would be to contact T-Mobile and see if they would be willing to do the unlock. Unless money is owed on the phone, there should be no problem.
     
  12. rigormortis, Mar 25, 2016
    Last edited: Mar 26, 2016

    rigormortis macrumors 68000

    rigormortis

    Joined:
    Jun 11, 2009
    #12
    t-mobile will unlock phones as long as they were paid in full and used for 70 days.

    now on to this AT&T matter.

    i have some really bad news for you. the t-mobile iPhone 6s plus was made for T-Mobile, Verizon and Sprint. it lacks channel 30. and because of this AT&T will most likely refuse to activate service on this model.

    my belief is based on my own unlocked 6s+ failing at&t's imei checker. its been my experience AT&T will refuse to activate new lines of service that do not pass this test. as a matter of fact, they won't mail you a sim card or allow you to place a web order unless they like your imei


    your going to need a pre-activated AT&T sim from another phone. you probably wont be able to sign up a new line of service. i think once the phone is unlocked it may work with a sim from another phone, but i have never tried it


    all is not lost. you can still bring the T-Mobile / Verizon / Sprint iPhone 6s + to cricket, because cricket likes non AT&T iPhone 6s+ phones!

    the 6+ was AT&T , T-mobile , Verizon in one model and A.T V & Sprint . Sprint wanted the Sprint Model

    the 6s+ is T, V , and S with AT&T wanting their own model
    --- Post Merged, Mar 25, 2016 ---
    oh . AT&T might accept the imei off of SIM FREE one. but thats not what you have. i don't have a SIM FREE so i can't test this
     
  13. lordofthereef macrumors G5

    lordofthereef

    Joined:
    Nov 29, 2011
    Location:
    Boston, MA
    #13
    I was made aware a few weeks ago by @eyoungren that TMO will actually unlock phones that have been registered on an active TMO account for something like 60 (or was it 90?) days irregardless of whether there is still an active payment plan.

    We are on Jump on Demand since launch and all three of our phones have been unlocked. Apparently it is a system bug that TMO is aware of, however they don't seem to care or... who knows...

    Anyway, try contacting the seller and see if they have a TMO account active that they can do this for you with (I do believe if it's still on an installment plan on the account that this would be the only way to go, but anyone is encouraged to correct me on this). If it's fully paid off it should be as simple as contacting TMO yourself and making this request.
     
  14. eyoungren macrumors Core

    eyoungren

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    Aug 31, 2011
    Location:
    ten-zero-eleven-zero-zero by zero-two
    #14
    40 days.

    I have since heard conflicting info from T-Mobile employees. So I am not sure if they really know what's going on or not. But my phones are unlocked and we still owe on our lease.
     
  15. tenaniing macrumors newbie

    Joined:
    Mar 25, 2016
  16. rigormortis, Mar 26, 2016
    Last edited: Mar 26, 2016

    rigormortis macrumors 68000

    rigormortis

    Joined:
    Jun 11, 2009
    #16
    its all moot. AT&T won't accept the phone on a new line, because its a 6s+ you will need it unlocked and a pulled sim and to cross your fingers. AT&T does not like the a1687/a1688
    --- Post Merged, Mar 26, 2016 ---
    soft of. if you buy a t-mobile phone from t-mobile its locked. if you buy a t-mobile phone from apple its unlocked
     
  17. rigormortis macrumors 68000

    rigormortis

    Joined:
    Jun 11, 2009
    #17
    without a valid imei number from an AT&T iPhone 6s+ you can't even add a sim card to your basket. 6splus imei.jpg

    this is the same error i got when i tried to add a blacklisted amazon fire phone.
    the pulled sim is your only hope once the iPhone is unlocked, if that doesn't work , you will have to switch to cricket.
     
  18. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #18
    No.
    Your understanding was false.
    Next time do your research before you buy.
    Not the sellers fault.
     

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