This will cause a random explosion to occur somewhere overhead, change your phone's colour, and make it a touch bigger than normal. Activate the Black Cellphone cheat by dialling 1-99, for example.Press up on your D-pad to bring up the phone, then enter the special code. On Xbox, PC or PlayStation, you can also enter cheat codes on the in-game phone.On PC, you can press one keyboard button (¬ in the UK or ~ in the USA) and then type in the cheat code on your keyboard.On Xbox, PC or PlayStation, input the code on your controller at any time while you're wandering around the game world.Depending on which platform you're playing on, here's how to use GTA 5 cheat codes: While most GTA games simply allow you to type in a cheat code while your character is walking around, GTA 5 has a few different ideas to mix up that formula. By entering your details, you are agreeing to our terms and conditions and privacy policy.