Hi. I am thinking of buying the S8. I know that it supports voLTE, but can I use it with BT? BT website says you have to buy the phone from them?
only the S9 from BT and iPhones are officially supported. The S8 may work with the correct firmware but BT will not assist with any issues with the handset or guarantee the service will work.
Please look at the main Wi-fi calling thread to read post about getting the S8 working.
I just posted in the Wifi Calling thread and then noticed this one.
I can tell you that BT 4G calling works on my S8 which was bought directly from Samsung and doesn't have any carrier-specific firmware. It's running Android Oreo and I'm using the EE APN.