On the Facebook app, how do you change your profile picture?
On your main FB page, click on your first name on the dark blue bar at the top of the page. Then click on edit page. Then move to the left hand side of the page and click on profile picture. Presto changeo!
Go to your pictures click in the one you want then click set as profile picture. :)
Go to the pic you want to be itClick the square with an arrow in the cornerSelect set as profile picture