I have a galaxy s6 absolutely love the phone. This past Friday, 09/18/2015, I started having problems with my mms. I have done factory data reset, manage applications delete cache and clear data from messages and verizon messages, changed from global to LTE/CDMA and vise versa. My phone still doesn't send or receive group messages, mms. I'm really frustrated I don't know what to do. This is my main form of communication. Please advise.