Press U to open the phone.
Use the arrow keys LEFT, RIGHT, UP, DOWN to move between apps, and ENTER to select.
Inside of an app, press RIGHT ARROW to open the context menu (if one is available).
Inside of the phone app, press LEFT ARROW to send a message directly to Police, Ambulance, Taxi, Mechanic, or AAA.
Note: A new phone script is in the works and is coming soon.. a detailed guide on the new phone will be posted shortly after its release.