I am using my sister's old iPhone 4 and she already had the Facebook app installed, so I just logged her out and signed myself in. There's no problem there, but the problem is that every time I try to play an app that you can sign in with Facebook, for example Candy Crush, It automatically logs in as her even if she's never played the game. I don't have to constantly switch accounts on Facebook, I'm always automatically logged in. Can someone please tell me how to get my Facebook profile to show up instead of my sister's? Thank you:)
Read more: My iPhone won't switch Facebook accounts?