How do you activate a cheat on grand theft auto episodes from Liberty City?

Answer 1

When inserting the disk, you will get a screen which allows you to choose which DLC you want to play. The only way I know to switch between the two is to quit the game and start it again, so you get the screen

Answer 2

brin up your phone and go to cheats then you will find your cheat you can enter a cheat by putting in the right numbers on your phone

Answer 3

Using the load feature in the pause menu.