The freshly released iPhone version of the GTA franchise is a huge success already and everybody seems to enjoy it. Well, if actually you don't have much patience and you really just care about blowing stuff up (I plead guilty to those two), we have something to relieve you. Thanks to a certain "Ozzytheking" from the Toucharcade's forum we now have iPhone GTA cheat codes!
They need to be entered by moving around the magnetic letters on the mission replay boards situated in any safe house. If you do it right the letters will go back to their original position and a message should appear at the bottom of the screen.
Here are the combinations :