Got sent a new sim a few months back. It's never seemed to work properly. I don't think i've ever been able to make a successful call it but i use it for calling so infrequently i dont really notice. What i notice is that whatever im home and signed into my home wifi i constantly get "refreshing sim data" notifications. This never happens when connected to other wifi networks and never happens using my data away from a wifi connection. Whats happening?