Just noticed an HD icon when calling my dad he has first net (AT&T). Does this mean HD voice between AT&T and t mobile is on or its just the pixel 3XL
T-Mobile gestart met uitrol HD Voice - Technieuws
T-Mobile launches Enhanced Voice Services; better than HD Voice
5G voice calls arrive for some T-Mobile customers in Salt Lake City and Portland | Engadget
T-Mobile Moves Beyond HDVoice – Graves On SOHO Technology
Business Phones, Plans, Wireless Solutions | T-Mobile for Business
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How To Enable HD Voice on your iPhone 6 | Digital Trends
What T-Mobile HD Voice Really Sounds Like | PCMag
T-Mobile will require new devices to support VoLTE - CNET
iPhone 5 Gets HD Voice On T-Mobile Exclusively - SlashGear
T-Mobile® Official Site: Get Even More Without Paying More | T-Mobile & Sprint Merged to Give You More
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HD‑Voice‑Fact‑Sheet ‑ T‑Mobile Newsroom
T-Mobile for Business is Now Selling Ooma AirDial, An Innovative Solution for POTS Replacement, As Part of Its Internet of Things Portfolio | Business Wire
T-Mobile Launches Voice Over LTE Ahead of AT&T | Digital Trends
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T-Mobile to Launch HD Voice in U.S.
T-Mobile upgrades your calls with Enhanced Voice | WhistleOut