I've had this problem since around September. I have reset my network connections so many times and it does work for a few hours. The only solution is to turn off wifi and download the message and turn it back on, which is fine except when you have no cell service at your house! I also have AT&T. I got a new SIM card tonight hoping that would work and it doesn't! I have had Samsungs notes since the note 3 and AT&T and I've never had problems like this. There is something wrong on Samsung's end.... this doesn't happen with iPhones on AT&T network. Please please PLEASE fix this!
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