I recenet (3-4 weeks ago) changed my phone to a HTC One mini 2 and keep getting a problem where I can receive calls or text messages. When people ring me they get a message saying "The mobile number you have called is currently unavailable, please try again later" and texts just stack up then come through in a bunch. The fault is intermittent and seemed to be only happening when I was connected to WiFi but there are times when I'm not and the issue still occurs. I rang tech support and the fault seemed to be with my SD card but I've not had this in my phone for 2 weeks and the problem persists. Last call to tech just said to call HTC?? Can't test the SIM as it's nano and don't have another phone it could go in. Tried factory reset but no change. Any advice?
It's the same phone number (which was also on Virgin) I had previously but a new SIM.