If you aren’t already logged into Facebook, type in your email address (or phone number) and password and tap Log In.
If you don’t have a city set as your current city, tap the Add current city button instead.
If you want to remove your current city completely, erase the city’s name, tap Save, and then tap Delete to confirm. If you’d rather hide your current city from your profile, tap Sharing With instead.
As you type, search results will appear. When you see the city you want to use, click it to select it.
