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Question T-Mobile USA Volte and VoWifi support?

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malikin

Senior Member
Aug 11, 2009
82
0
London
Hey XDA, is USA model XQBC62 work with T-Mobile Volte and VoWifi?

PS: my old Xperia5 II wasnt able to work and returned back to Sony week later (sad)
 

malikin

Senior Member
Aug 11, 2009
82
0
London
got an answer from SONY

We received your inquiry regarding the Xperia 1 III XQBC62 and we appreciate the opportunity to help you.

In regards to your inquiry, we kindly inform you that the compatibility of VoLTE or VoWifi will depend on the operator network. Sometimes, your phone must be operator-branded and/or use operator-customized system software to be able to use VoLTE or VoWIFI. All recent Xperia phones (like Xperia 1 III or Xperia 5 III) are enabled to receive those services by default, however, if the operator devices to give that service to certain models only, it will be necessary to contact T-Mobile as they have to provide you with the list of phones that will work with those services.
 

jaseman

Senior Member
Aug 27, 2012
710
200
Spring
This is a known "issue" with T-Mobile as well as all the other carriers. The reasoning behind this is sound for the vast majority of people. If you have a cell signal then VoLTE will work and so will using cell service to make an actual phone call. VoWIFI is for those occasions when you do not have a cell signal at all and you need to make a call over WIFI. Try calling T-Mobile and see if they will provision your phone to use VoWIFI. YMMV
 

bountyman334

Senior Member
Sep 20, 2007
3,204
2,028
Decatur,GA
I have it after build.prop edits
Screenshot_20211127-121644.png
Screenshot_20211127-121646.png
Screenshot_20211127-121648.png
 
like put phone into airplne mode and calling someone from wifi only?
Well, yes, that is a sure way to make sure calls are going through Wi-Fi and not cellular. I'm am asking because prior I had another unsupported phone on T-Mobile. I did a similar hack to enable Wi-Fi Calling in settings and turned it on, but in airplane mode could not make a call over Wi-Fi.
 

Ausdom88

Member
Aug 28, 2021
5
0
How easy is it to edit the build file?
Hoping to find a work around for Australian Telco's as Volte is compatible but it doesn't work on the 1 iii.