Any way to use Wifi Calling for T-mobile by Galaxy S5 Verizon?

[Win0416]

Hi All,

I moved Carrier from Verizon to T-mobile, and found one good feature of T-mobile S5 is not working in Verizon version.

Wifi calling, I'm using Galaxy S5 Verizon, all others are good, except Wifi calling.
Sim error was already handled by rooting and deactivating service.

Is there any way to activate wifi calling feature in Verizon Galaxy S5 version, I searched, but by locked Bootloader, I can't install T-mobile firmware in Verizon version, and also I can't do Safestrap with OG5(with root) rom either.

My Verizon S5 phone is very good in most of area with T-mobile, except my office, by poor T-mobile signal (I guess, there is Verizon router in my office area, and locking my signal, for when I out of office, full t-mobile signal is detected, but when I enter to my office, all dead. , no problem when I used Verizon Carrier )
So I need wifi calling feature at my office, but I can't use it with Verizon version.

If you guys can provide any other recommandation. it will be very helpful to me.

Thank you!!!!!!!

 

[Win0416]

I found the answer from the other thread.

http://forum.xda-developers.com/showpost.php?p=61489873&postcount=17

Downgrade to NCG build (Kitkat) by odin again and then rooted.
And then followed guide in the link (I used Flashfire).

Only one thing in Twi5ted Lollipop 5.0 V7, Select "No thanks" to sharing data with Samsung in EULA Screen or will meet sim problem.
http://forum.xda-developers.com/showpost.php?p=59048435&postcount=71

In that case to resolve the issue, need to factory reset and then restart initial setup again.
(I did )

Currently my one looks good
Wifi Calling, Bluetooth, GPS and all of other functions working good.

 

[Chopstix9]

nm

 

[Chadwick108]

I really wish wifi calling wasn't so locked down on Big Red (VZW). Hangouts dialer is a good alternative as long as the wifi is stable enough.