Question T-Mobile USA Volte and VoWifi support?

[malikin]

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)

 

[minhajmsd1]

VoLTE works but there isn't an option for Wifi calling that I see

 

[malikin]

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]

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

 

[sergkei.triantafyllidis]

As a workaround, I use T-Mobile's app "DIGITS" for calling over Wi-Fi.

 

[bountyman334]

I have it after build.prop edits

 

[sergkei.triantafyllidis]

I have it after build.prop editsView attachment 5469181View attachment 5469183View attachment 5469185

Have you tried to make a call over Wi-Fi? Does it actually work?

 

[bountyman334]

like put phone into airplne mode and calling someone from wifi only?

 

[sergkei.triantafyllidis]

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]

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.

 

[royhanks3]

I have it after build.prop editsView attachment 5469181View attachment 5469183View attachment 5469185

Hi, can you share this build prop edits so we can prosper as well?

 

[malikin]

Hi, can you share this build prop edits so we can prosper as well?

seems like its just a photoshop work