I think this is an iPhone only issue but I'm not sure; If when paying GTA III you get a phone call and you leave it to go to voicemail, the sound in the game will turn off until you restart the game, but this isn't the major bug. The major bug is it will disable your ability to save at safehouses. You can enter the safehouse, but it won't trigger the save menu, leaving you stuck in a locked room. (I will upload the screen shot when I get home). By luck I had some grenades so killed myself, but I can't get into the safehouse now, it's locked. I have to rely on not turning my iPhone off or quiting the app to continue playing or lose my side quest missions I've just completed. Be warned.