I've been using my ATT iPad 2 SIM in my new VZ iPad for the unlimited data, its been working fine for months. Now today I cant get online, I get this in Safari: Response Error. Technical description: 502 Bad Gateway - Response Error, a bad response was received from another proxy server or the destination origin server. And if I go to Settings > Cellular Data > I get this: This device requires an ATT 4G LTE compatible SIM Card. Please insert .... I cant use Safari, but I can send and receive email. And apps seem like they can get online as well, it seems like it might only be Safari. I tried clearing history and clearing cookies and data. Any ideas?