Want to make sure to find out if your SIM card is HD Voice compatible? With AT&T HD Voice, you enjoy a higher level of voice quality when you make and receive calls.Īs explained under SIM card compatibility:ĪT&T HD Voice requires a SIM card that is UICC-G or higher SIM card installed in your smartphone to enjoy the rich calling experience of AT&T HD Voice. Even if you have a compatible SIM card, you will need to make sure the device you’re moving your SIM card to will work on our network.īecause 3G is now gone, we no longer activate phones that don’t support HD Voice. Heads Up: Customers using an unsupported device will need to upgrade to an HD Voice capable device, upgrade their SIM, or both. ![]() Or, if you have a phone that should work, but isn't, you can also check your APN settings to confirm they are correct. If it’s not listed, you may need to update your current device, or get a replacement. ![]() If your phone is on the list, you're good to go. ![]() To know where to begin, check out our compatible device list. It's easy to find out if your device will work now that we've upgraded our network. It is important to know whether you will be able to use the phone you know and love on our network, especially now, since we phased out our 3G network.
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May 2023
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