How do I keep someone else from using my facebook on their phone?

[Josh Beal]

I was using facebook on someone elses phone when it died, can I prevent them from accessing it?

[2fast4u]

yes, go to facebook, settings, security, and somewhere in there you will see an option to sign out of all devices. hope i helped!!

[OrangeTheLord]

Just do a password change and they can't get on it. After a password change facebook should log off of all computers and phones its logged into.

[Colton]

yup, get a hold of their phone and sign out if your signed in still (which you shouldn't be.) other than that... close/suspend your account for a while and then open it back up is all I can think of.

[Doug]

change your password quick

[NAeeM]

Yeah. Just go to your account-setting-security-and somewhere in there you will see an option to sign out off all devices. I think it will.

[Sourav]

1.Just do a password change and they can't get on it. After a password change facebook should log off of all computers and phones its logged into.
2.Teach them a lesson ....
3.become friends again!!!

[Marry]

Don't worry dear,
Actually Facebook also given a login message security.
So those people get notification about someone login there account immediately that use this feature.
Hope this will help you.