I have a galaxy s7 and i cannot get the HD video and voice calling to work. I have it turned on under settings and it shows as activated on my account, I have restarted my phone and even gone as far as doing a factory reset but it still doesnt work. It jumps to 1x whenever i make any calls and will not allow me to make any HD voice or video calls. My wife got the same phone at the same time as me and hers works fine. Is there any solution to this?