If you’re like most people, Facebook is one of your most important online tools. But if you’re using an iPhone, there’s a good chance that you don’t have your Facebook password set up. To view your Facebook password on your iPhone, open the Settings app and select General. Under Security, select Password Management. In the Password Management screen, enter your Facebook username and password. If you’ve forgotten your Facebook username or password, you can reset them by clicking on the Reset button at the bottom of the screen.