I had purchased S8 unlocked version from Curry's in the UK coz I travel a lot and have to change SIM according to the country. To my disappointment I am unable to find VOLTE option in the settings. I believe this is a world phone and with being a flagship model this should have been enabled. Lower models do support but Samsung S Galaxy line has this issue.
How do I get VOLTE to work? Should I wait for Samsung to push a update. ?
Have a look to change your network from "Global" to "CDMA\LTE" in your settings, go to Settings>Connections>Mobile networks>Network mode and change it and then go back in and see if the VoLTE option is there.
I had volte, until yesterday, the latest patch update messed it, volte option just dissapeared and calls are falling to 3g, however volte indicator is still up. Phone is s8+ sprint unlocked and sim is from Movistar Colombia (also with vilte, which it seems unaffected) please a solution for this!