So I picked up a 1520 and moved to AT&T but I'm having a connection problem which I initially posted HERE. My phone in most cases will not connect to cellular data after leaving a Wi-Fi connected area. The AT&T rep I just spoke to said that is because I'm not toggling off my Wi-Fi when I leave. I told him I never had to do this on my last carrier. He said that is how the service works and he even has to do it on his phone. I disagreed with him but he persisted. Is this a feature with AT&T service or did this guy just blow smoke up my ***?