UMA Wi-Fi calling shutdown

Learn about the UMA Wi-Fi calling shutdown and impacted devices.




T-Mobile decommissioned its UMA and GAN-Lite service, which supports our first generation Wi-Fi calling feature, on June 28, 2017. This change impacted a small number of customers, and we notified them via SMS beginning March 8, 2017.




  1. Review the impacted devices to determine if you were impacted by this change. If you are not using one of these devices, you weren't impacted.
  2. If you are using one of the impacted devices and you do not use Wi-Fi Calling, you weren't impacted by this change.
  3. If you are using one of the impacted devices and you use Wi-Fi Calling, contact us to upgrade your device to one that is compatible with our latest Wi-Fi Calling feature.



Impacted 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





Why did T-Mobile shut down the UMA/GAN-Lite platform?

The platform supporting UMA and GAN-Lite service is no longer supported by infrastructure vendors and handset manufacturers have stopped providing support for capable devices. This lack of support made it difficult to provide our customers with uncompromised Wi-Fi Calling service.


What do customers need to do?

Customers with older-model UMA or GAN-Lite non-LTE phones with Wi-Fi Calling technology should contact us with any questions, and discuss options to upgrade to a new device, as needed.