On PS4 or PS5, the GTA 3 cheat codes look like this:
Once you get a keyboard working with your phone or tablet, the GTA 3 cheat codes for iOS and Android should be the same as the PC ones listed below.
However, cheat codes do work in the GTA 3 mobile version - you should be able to type them in with help from a third-party app like Hacker's Keyboard, or you could buy a physical keyboard that connects to your phone. If you're trying to use GTA 3 cheats on a mobile device like an iPhone, iPad or Android phone/tablet, you might have noticed that the lack of a physical keyboard is a bit of a stumbling block. GTA 3 iPhone and Android mobile cheat codes
Just let your character stand there on the screen while you input the cheat code of your choice. If you want to use a GTA 3 cheat code in the remastered Definitive Edition, the process is the same as it always has been: while you're in the game, simply press the relevant buttons without pausing the game.