Open Your Facebook Account On PC And Click On The Status Box. Under The Status Box, You Will See A Link "Add Current City", Click On It And Type In The City Or Country In The Pop-Up Box. Click OK And Update Your Status. You Will See The Location Under Your Status. All Your Friends Will See That You Updated Your Status Near A City e.g Lagos etc.

Note: You Can Remove The Current City By Following The Steps Above, Click On The X Button To Delete Your Present Location, You Can Decide To Change It To Something Else Or Leave It Blank.