Recently I have started to notice that some of my contacts don't receive my FaceTime calls. That person called me and it went through. As we were talking, I learned that they also aren't getting my texts. I noticed that the little "delivered" messages isn't showing up. I decided to try and call that person and it rang once, then went to voicemail. They didn't end the call. When I went back through my messages, I noticed that they weren't sending for another individual. I thought it might be a certain wireless company, but they each have different carriers. I tried deleting our message history and resetting my phone, but neither seem to work. I went from being able to talk to them no problems, to not at all. They can still call and text me, but I cannot call or text them. HELP!