I think Sprint must’ve turned it off on one of the updates. My wife upgraded from the iPhone 7 to the XS and it made her upgrade to iOS 12.1.3 when she was restoring from the cloud and VoLTE was disabled for her. I had to manually turn it on. Voice quality is SO MUCH better on VoLTE. She sounds so much clearer and almost like HD Voice. I have Verizon and when she would call me from her 7, it was so hard to understand her, now it’s night and day.

I live in Brooklyn, NY (VoLTE market)

On 2/5/2019 at 10:34 AM, Wfmets45 said:

I think Sprint must’ve turned it off on one of the updates. My wife upgraded from the iPhone 7 to the XS and it made her upgrade to iOS 12.1.3 when she was restoring from the cloud and VoLTE was disabled for her. I had to manually turn it on. Voice quality is SO MUCH better on VoLTE. She sounds so much clearer and almost like HD Voice. I have Verizon and when she would call me from her 7, it was so hard to understand her, now it’s night and day.

 

I live in Brooklyn, NY (VoLTE market)

The VoLTE setting would not have been turned on in the backup since the backup was made from a iPhone 7.  The restore on the XS, restored the settings from the iPhone 7.  It was the restore process that turned VoLTE off on the XS.  That appears to be a bug in either Apple's restore from backup process or Sprint's code that enables VoLTE where that code did not run after a restore.

1 hour ago, radem said:

The VoLTE setting would not have been turned on in the backup since the backup was made from a iPhone 7.  The restore on the XS, restored the settings from the iPhone 7.  It was the restore process that turned VoLTE off on the XS.  That appears to be a bug in either Apple's restore from backup process or Sprint's code that enables VoLTE where that code did not run after a restore.

I had to turn off my wife’s VoLTE. She was complaining about receiving calls but not being able to hear the person. My brother in law was also complaining about the same thing. I had to sens him a screen recording so he could disable VoLTE. Hopefully it will get better with time.

I found this article interesting regarding VoLTE updates! Enjoy all! 

https://www.fiercewireless.com/wireless/sprint-eyes-volte-launch-virtualized-core-2019

13 hours ago, ceopwong said:

I found this article interesting regarding VoLTE updates! Enjoy all! 

https://www.fiercewireless.com/wireless/sprint-eyes-volte-launch-virtualized-core-2019

I've read this article before.  But can anyone explain exactly what this means?