You will have to type the same cheat again to de activate it.Hope this is helpful. :)
Not online
while you playing Gta, you can just straightly enter the cheats codes. if you wanted to know where is the cheats, just find it in google.
To activate cheats in GTA 3 on iOS, you typically need to use a virtual keyboard or a cheat app, as the game does not have a built-in cheat input feature like the console versions. You can find a list of cheats online, and then simply enter them using the on-screen keyboard during gameplay. Keep in mind that using cheats may disable achievements or trophies.
You can type cheats anywhere.You just need to start the game and type cheats while playing on the same screen.The cheats activate in the background.
the cheats are different
gtasanandreas.net/cheats
in order to activate them you must go to options and then advanced settings and then activate cheats.
Monstertruck
the cheats are same as gta vicecity
type on google cheats of gta 3
the GTA pc cheats are awsome and here they are: full health:O,R,L,A
you dont activate cheats you just get in glitches which are very easy