1. A phone comprising: a wireless transceiver to send and receive wireless communication signals; a processor to execute code; wherein the processor is (a) to make a determination that a user of the phone is sitting in a driver seat of a moving vehicle, without relying on any signal transmitted by a steering wheel of said vehicle, and without relying on Global Positioning System (GPS) data to differentiate between a phone-user who is a vehicular driver and a phone-user who is a vehicular passenger; and (b) based on the determination, to block one or more features of the phone.