Hi,    I have been unable to make or receive calls for a few days now. Mobile data works on 4.5G and text msgs are fine. I suspect this is due to 3G network shutdown. My phone doesn't support internet calling. What is the next step? Should I move to a new provider?    I can't call tech support, obviously.   The emails that provided information about #G shut down don't say what to do next.   Thanks. ... View more