I live in texas, and I have the unlimited texting plan and free tmobile to tmobile calling, and have nation wide coverage. My friend in new york has basically the exact same plan. We used to be able to call eachother perfectly, and text each other freely. But in the past 3 weeks its got a little weired. He can send me a text message, but his calls won't come through. And I can call him, but my texts won't go through.and its only to each others numbers. Calls and texts work perfectly fine for othernumbers. Now, Its really annoying. We both even changed our cell phones, but it still isn't working. What do you think is the problem? Help please 