I have a BB passport and my buddy a BB Q10. We could always text but now he does not receive mine unless he writes me one, then my texts show up. he can email or call me. It is like my number is "blocked " from him receiving texts. He has deleted my contact and re entered. Entered the number under a different name. Pulled the battery to re boot. Nothing works so he can now receive a text from me when I send it. Any ideas??