Jerry has an Android mobile phone and after an update, he lost the use of both his cameras. Can he roll it back? Leo says that the upgrade probably didn't go well and failed, so try upgrading it again. You don't really want to go backwards because of security. Leo recommends doing a factory reset to wipe the phone and reinstall the OS. Be warned though that this will wipe the phone of all data apps and photos, so back it up to Google. But in most cases, that fixes the problem. If that doesn't work, the only way to go backwards is to root the phone. Check out XDA Developers for how to do so.