1. Dlrkckelc's Avatar
    I have an AT&T phone that I switch service to T-mobile. The reason I switched was to be able to text while on a commercial aircraft. I'm unable to make wifi calling or text onboard a aircraft.

    I've called T-Mobile, Samsung and AT&T. Everybody is pointing fingers at each other. Any suggestions would be appreciated.
    12-11-2017 09:06 AM
  2. N4Newbie's Avatar
    The first question is, can you text or call on Wi-Fi when *not* on an aircraft?

    Put your phone in Airplane mode and then re-enable Wi-Fi (only). Can you make calls? Can you text?
    12-11-2017 09:37 AM
  3. Gayle Lynn's Avatar
    Did you take it to tmoibe and get new SIM? If not seems you lose ATT WiFi calling. Yes it works in pl aces that have proper WiFi.

    You didn't need to switch service to get wifi calling, but you do need more than just a GSM phone and SIM.

    https://m.att.com/shopmobile/wireles...i-calling.html
    12-11-2017 10:18 AM
  4. Dlrkckelc's Avatar
    Nope not able to even turn wifi calling on. I do have a T-Mobile SIM card.

    I'm unable to call or text in Airplane mode
    12-11-2017 12:02 PM
  5. Gayle Lynn's Avatar
    I have AT&T prepaid SIM and that pho me will not get wifi calling.

    You need to take it to the t-mobile store. BYO phone and full plan. An $9 SIM card isn't enough. Which is what it sounds like from here.
    mary beth hale likes this.
    12-11-2017 12:13 PM
  6. Dlrkckelc's Avatar
    I understand that but when the sales person said all features would work that same as with AT&T. I don't want to pay another 800+ for a phone.
    12-11-2017 03:16 PM
  7. Gayle Lynn's Avatar
    No. Just BYO but monthly contract with T-mobile. Both AT&T and T are GSM.

    Call or chat. I find chat to be better if you can't get to a store.

    Prepaid Simms like you can buy on Amazon will never support WiFi calling. For that, those $20/month fees to connect to the T-Mobile network are essential part.

    https://support.t-mobile.com/docs/DOC-1680
    12-11-2017 03:39 PM
  8. D.P.G.'s Avatar
    You need to flash it with T-Mobile software. I switched from Sprint to T-Mobile with an unlocked snapdragon S8+ and had many issues till I installed the T-Mobile software once I did everything worded fine.
    12-11-2017 06:21 PM
  9. Gayle Lynn's Avatar
    Don't you sometimes just need to change APN setting?

    (I would not flash phone. There are $300 deals out there to be had on tradeins and the like.)
    mary beth hale likes this.
    12-11-2017 06:28 PM
  10. Dlrkckelc's Avatar
    Why would you not flash the phone? I'm trying to sell my S8+ with no luck as of yet.
    12-11-2017 07:11 PM
  11. aviators8's Avatar
    You must have a branded AT&T or Verizon to use wifi calling on the respective networks. If you use non-branded or international, the wifi calling option isn't even available in settings. I found this out the hard way when I bought an unlocked Verizon phone for ATT network. Had to return the phone and buy a branded OS ATT phone.
    mary beth hale likes this.
    01-29-2018 02:00 PM

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