Without any special announcement, Facebook has officially activate “Find Friends Nearby”. This option is currently available on iOS App, Android, and http://fb.com/ffn for mobile phone platform. You can access to this function by browsing to find friend option.
Just as the name suggested, this function allows you to find your friends based on geolocation data and show them on a list. It won’t be hard to find your Facebook friends now. With this function, you will be able to add your friend without having to type their name as long as they are right next to you.
You can check out this option on your own.