Spawn Duke O’Death: Dial 1-999-3328-4227 (DEATHCAR) Complete the "Duel" random event to unlock first
Spawn Kraken Sub: Dial 1-999-282-2537 (BUBBLES) Finish the "Wildlife Photography Challenge" to unlock first. No other boat cheat exists in the game
Spawn Dodo Airplane: Dial 1-999-398-4628 (EXTINCT) Complete the "Sea Plane" random event to unlock first
Further Reading
If you need to use a parachute then press the A button on your controller. You can control your descent with the left stick on your Xbox controller. Note there is no way to deploy a parachute after the Skyfall cheat has been activated. Instead, to try and survive, you must press forward on your controller and attempt to land head first into the ground or a wall.
Entering the weather cheat will cycle through the following weather types: sunny, clear, cloudy, smoggy, overcast, rainy, thundery, clearing and snowing.
You must unlock the special vehicle you wish to spawn (by playing the game) before you can use the cheat.