My messages all of a sudden (on December 6th, 2014) I stopped being received by only ONE person in my contacts list (my most important and most frequently used contact).
I have HTC One, he has Metro PCS on Samsung Galaxy Lite. He was able to receive my messages up until I was forced to try out Verizon's visual voicemail app to check my voice messages. I tried multiple fixes from reading these forums with no luck. I cleared the apps data and cache but I'm not able to disable or uninstall the Voicemail App so I am completely at a loss. He receives ALL text messages from everyone else except me. We were forced to use Facebook messenger to keep in contact and very unhappy about it. Please help.