How to log into your Facebook account using your email, phone number or username., 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., Find out what to do if you're having trouble logging in, or learn how to log out of Facebook., Please enter your email or mobile number to search for your account., Get support to recover your account. For best results, use a device you've used to log in before., 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..