The few times I've used Siri to make calls in my RTL-T, I noticed it often doesn't give you enough time to speak your command (e.g. "Call so and so, home"). I then have to do the long press of the voice button on steering wheel, and try again. It seems to barely give me 2-3 seconds to complete my voice command before beeping at me. Is there a setting somewhere to slow Siri down a little?