A driver can be allowed to use his mobile phone while driving only under specific conditions, primarily when using hands-free options. These include using a mounted phone with one hand, voice-activated dialing, Bluetooth headsets, speakerphone functions, or other hands-free devices without holding the phone. Using a mobile phone by holding it in hand, dialing by pressing multiple buttons, or reaching for it unsafely is generally prohibited. Exceptions typically include emergency calls (e.g., 999 or 112) when it is unsafe or impractical to stop, or when the vehicle is safely parked or completely stationary (not in stop-and-go traffic). The phone must be located within easy reach to ensure the driver remains properly seated and restrained by a seat belt. In many jurisdictions, it is illegal to hold or use a mobile phone while driving, even when stopped at traffic lights or in traffic jams, unless a hands-free kit is used. The rules may vary slightly by country or region, but the emphasis everywhere is on minimizing distractions for safety reasons and keeping full control of the vehicle during operation.