For WiFi calling on iPhones, Tmobile used to prefer WiFi. However, they changed it awhile ago and now prefer cellular. It will switch to WiFi calling only if your cellular signal gets weak. Like you, I believe that WiFi calling sounds better and has less latency. However, it has been less reliable for me than cellular calling.
How to enable wifi calling on iOS phone | AT&T Community Jul 14, 2018 iPhone XR T-Mobile Wifi Calling | MacRumors Forums Nov 16, 2019 Solved: Wifi calling won't activate - Cricket Wireless Hello, reaching out here as I'm at wit's end with Cricket and this Wi-Fi calling issue. Background, initially signed up for Cricket with an unlocked S6 about 4 years ago. By rule that phone couldn't get wifi calling because it wasn't Cricket branded. Fair enough. June 5, I upgraded my phone to a Cricket branded S10.
Aug 17, 2012
How to Turn on WiFi Calling on Android: 6 Steps (with Nov 09, 2018
Do US carriers allow WiFi Calling on unlocked iPhone X
iPhones- Wifi Calling Not Working at Home : tmobile For WiFi calling on iPhones, Tmobile used to prefer WiFi. However, they changed it awhile ago and now prefer cellular. It will switch to WiFi calling only if your cellular signal gets weak. Like you, I believe that WiFi calling sounds better and has less latency. However, it has been less reliable for me than cellular calling. How do I use WiFi calling on my iPhone? - XFINITY Select WiFi Calling. Toggle on the “WiFi calling on this iPhone” switch. Select “Enable” when you see the popup. Follow the instructions to register your emergency address and accept Terms and Conditions. One additional tip: if you would like for your iPhone to default to calling over WiFi while roaming internationally, toggle on the Do US carriers allow WiFi Calling on unlocked iPhone X Apr 12, 2018 Unlimited Plans, Cell Phones, Evolving 4G & 5G - T-Mobile