Find out what to do if you're having trouble logging in, or learn how to log out of Facebook., For best results, use a device you've used to log in before. If you’re helping someone else, make sure they try these steps on a device they’ve used to log in before., Please enter your email or mobile number to search for your account., Log in to your Meta account to access Meta services and manage your devices., Visit facebook.com/login/identify in a browser. Enter an email address or phone number you think might be associated with your account. Make sure that the account that comes up is yours. If it isn’t, click Not you? and try searching with a different phone number or email address., Luckily, logging into Facebook usually just requires your email and password. Here's how to log into Facebook using your Mac, PC, iPhone, or Android device..