Are the Ford SYNC voice commands using minutes on my phone?

Are the Ford SYNC voice commands using minutes on my phone?

I just bought a new Ford and it has SYNC and i use the voice commands sometimes and in the last month the minutes on my phone have been getting used up more and i've been talking on the phone the same amount. Is verizon lying about my minutes or is SYNC using my minutes? I'm freaking out!

SYNC is bluetooth and thus uses no minutes for voice commands.