Need Radio / Firmware with VoLTE Support

[deepsaha007]

As title said, anyone can share OnePlus 3T , modem/radio and firmware which supports VoLTE in INDIA i.e for JIO..

Need it urgently , I have USA (North America) variant , currently VoLTE is not supported but 850 band is picking up fine.. Need help in this..

 

[akxak]

I got the 3T (US) on Tuesday and after upgrading it to Nougat, I could not get VoLTE and the SMSC configuration to work.
I tried different roms all with the same result. Going back to MM/OOS 3.5.4, VoLTE and SMSC settings did work instantly again.
So the firmware/modem is obviously broken.

Did you try a MM rom/firmware?

Later: Oneplus support stated the following on my report that Nougat OOS 3.5.4 breaks VoLTE, Wifi calling and SMSC setup:

"I highly suggest staying with the 3.5.4 update as of this moment. Our developer team is still working on it and we will make sure that the next update will fix these bugs."

 

[sscheema]

First Android mobile after years of iOS - bitter experience. Such well talked about mobile and a pain in the a**. How can an upgrade plug a capability already available and make it a brick?

 

[akxak]

I had trouble with the OOS 4.0.3 and went back to the MM firmware, yesterday installed the 4.1.3 and no modem problems, LTE, VoLTE and VoWIFI in TMO US network run fine.

 

[MaxFTW]

In PL we can only dream about TMobile delivering VoLTE to OnePlus devices :^)