Before the Marshmallow updates my S6 Edge would keep internet/data while in a call. Now when I'm making a call it ALWAYS turns off. How can I keep this from happening?
I'm not sure that VoLTE would have anything to do with it, that just literally means Voice Over LTE., the connection has to be there before that would kick in. You should maintain a Data connection during a call if you are using 4g.
I haven't used a cdma network for a while because of the various troubles with it and thr trouble moving a phone from one network to another,