Despite several lengthy calls with Customer Service the call quality is awful. But everytime they try something the next call (test call) works fine. Wifi calling only seems to work with other mobiles, so any large business that calls like a bank, pension, insurance, can't hear me at all, I'm basically hanging out a window to get a tiny signal. Is there anything else that could help like a booster or aerial, or should i just try moving to EE?
