Switched to new iPhone, now my service isn't working, and phone in general isn't working, unless connected to WiFi. So when ever I leave my home, and I try to use my cellphone it will say, "Could not activate cellular data network." "You are not subscribed to a cellular data service" it's usually only between 1 and 3 "dots"/bars then it has AT&T, wifi symbol, and then a symbol with a telephone with an arrow coming out from the middle of the telephone. What does all of this mean? And why am I not able to do anything once disconnected from WiFi??
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