Will ATT iphone work with T-mobile's Wifi calling?

Discussion in 'iPhone' started by ACG12, Jan 20, 2016.

  1. ACG12 macrumors 6502a

    Jun 9, 2015
    Seriously considering dumping ATT and switching over to T-mobile, but wanted to confirm this feature will work. Can anyone who's switched confirm that wifi calling will work if I unlock my ATT phone and switch it over?
  2. Closingracer macrumors 68020

    Jul 13, 2010
    Yes it's the same phone model. Apple sells two models in the United States.... One for Verizon , AT&T and T-mobile and one for sprint. The sprint one can work on any network given it is unlocked.
  3. Applejuiced macrumors Westmere


    Apr 16, 2008
    At the iPhone hacks section.
    Yes, as long as your AT&T iphone is unlocked.
    Wifi calling and every Tmobile feature will work fine.
  4. patt2k macrumors regular

    Dec 31, 2012
    I am using Verizon model on T-mobile. Works fine. Verizon models come sim unlocked out of the box.
  5. imlynxy macrumors 65816

    Mar 8, 2012
    When you swap your sim cards, t-mo sends a carrier update on your phone, just accept it and you will have all the features there. There is a problem sometimes with non-att iphones to obtain volte from Att, but this is another story.
  6. rpetunderclass macrumors regular

    Dec 9, 2014

    Can confirm, I have tried a Verizon, AT&T, & T-Mobile sim and got let/4g/3g volte/wifi calling with no problems.

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