Brett has an older Dell Venue tablet and wants to update it, but they don't support it anymore. Leo says that his only choice is to root it and put a custom ROM on it. Leo says the first place he'll want to go to put a custom ROM on Android is the XDA Developers Forum. He can get step-by-step instructions for his exact model. There is a Dell Venue section, but he should be sure he uses the exact model or he could brick it.