When I tell Siri to "call my sister" or "call mom" she always asks me "work or mobile?" and I have to take another second to select which one. It kinda takes the convenience out of using Siri. I think for most people, 99% of the time you're trying to call someone, you're trying to call their cell phone. So wouldn't it make sense to make Siri call mobile numbers by default and only call alternative numbers when requested? Or at least make an option out of it so you can select a default number for contacts?