I upgraded with ID last month but I think the iphone I’ve been sent is faulty. It regularly cuts out during calls, and when I turn it off, it can take up to five minutes to turn back on. It’s definitely not right. I’ve been trying to get through to someone via live chat but it is constantly unavailable. Totally appreciate the situation with fewer staff due to Covid etc, but has anyone any idea as to how I go about getting a replacement handset?