I recently got a Jitterbug Flip phone (Yes, with the big numbers) and finally got it paired to the 2013 GLK350 I have. I can receive calls, but cannot place calls. I feel like there's something so obvious I can't see the issue. A big problem is that I live where cell service is spotty at best, BUT the same thing happens in the city within sight of two cell towers: "NO SERVICE" Any information would be appreciated since I cannot raise Mercedes customer assistance: they're either in a "meeting" or I've just stayed on hold for literally an HOUR with no response. I love this GLK but i HATE Mercedes service I'll never spend that kind of coin again. Hyundai has better Customer service. Anything?