UMA calling shutdown

T-Mobile decommissioned its old UMA and GAN-Lite service, which supported the earliest Wi-Fi calling feature, on June 28, 2017.


This does not affect the modern Wi-Fi Calling service on recent devices, since they don't use UMA.



UMA Wi-Fi Calling shutdown

  • Our modern Wi-Fi Calling from T-Mobile service is not affected, and it's still available! This is what's on all T-Mobile phones from the past several years.
  • The old UMA technology in our first Wi-Fi Calling devices is not supported by our industry anymore, which made it difficult to provide our customers with a top quality Wi-Fi Calling service.
    • The platform supporting T-Mobile's UMA and GAN-Lite service is no longer supported by infrastructure vendors.
    • Device manufacturers stopped providing support for capable devices.
  • This change only affected a small number of customers.
    • We notified them by text message beginning March 8, 2017.
    • If you're affected, consider upgrading your device to get our current Wi-Fi Calling.



Check if you're affected

Review the UMA & GAN Lite devices below to see if this change affects you. If you're:


  • Not using one of these phones, you're not affected.
  • Using one of these phones and don't use Wi-Fi Calling, you're not affected.
  • Using one of these phones and use Wi-Fi Calling, please upgrade your device. Our devices for sale are compatible with the current Wi-Fi Calling feature.


UMA & GAN Lite devices





HTC MyTouch 1.2

HTC MyTouch 3G

HTC MyTouch 4G

HTC MyTouch 4G Slide

HTC MyTouch Slide

HTC Shadow

HTC Shadow II

HTC Sensation

HTC Wildfire


Huawei Prism

Huawei Summit


LG Doubleplay

LG G2x

LG Optimus One

LG Optimus T


Motorola Charm

Motorola Defy

Motorola Cliq2


Nokia Astound

Nokia Mode


RIM BlackBerry 7290

RIM BlackBerry 8820

RIM BlackBerry 9100

RIM BlackBerry Bold 9700

RIM BlackBerry Bold 9780

RIM Blackberry Curve 8320

RIM BlackBerry Curve 8520

RIM BlackBerry Curve 8900

RIM BlackBerry Curve 9300

RIM BlackBerry Curve 9315

RIM BlackBerry Curve 9360

RIM BlackBerry Pearl 8100

RIM BlackBerry Pearl 8120

RIM BlackBerry Pearl Flip 8220

RIM BlackBerry Torch 9810


Samsung Dart

Samsung Exhibit

Samsung Exhibit II 4G

Samsung Galaxy S 4G

Samsung Gravity Smart

Samsung Sidekick 4G

Samsung Vibrant