I'm out of the country (USA) in Israel. I have an international plan for the whole month of June 6- July 5th. I was able to use my iMessage using the wifi the first day I was here and make calls using data. Then on day two I suddenly got no service wherever we went. I am able to connect to wifi but my iMessage won't work or FaceTime and I have no service to make calls. Please help. Why is my phone not working. I have the iPhone 6.