I can send and receive messages from everyone except for her; she even receives my messages, I just don't seem to get hers from her Iphone 6 she got from TMobile. We both deleted our entire conversations and contacts completely, hard reset our phones, updated our ios systems to the newest available software, I attempted to call her and use the option to decline the call with a text message, but my phone didn't even react to the call being declined. We have no issues making calls to each other, I just can't receive texts from her. I'm out of ideas, can anyone help me?