If you have an Instagram account, you can log into it from any device — your phone, tablet or a browser on your computer. All you need are your login credentials, such as your Instagram username ...

However, logging in to your account can be a little confusing, especially if you gave multiple accounts. The Gmail sign-in ...

And although Facebook's apps have different looks and features, they've got one thing in common: To use them, you need to log into your account. Luckily, logging into Facebook usually just ...