I just got the galaxy s4 (sgh-m919) and have it activated through t-mobile. I paired it with my toyota prius (2012) and everything works ok. When I am at a standstill I have access to my contacts on the prius screen. But when the car gets above 7mph the contacts selection is disabled and I can't do anything with it. My previous phone (samsung captivate) did not do this. Any ideas on how to stop this from happenning would certainly be appreciated.