Is data used if you stay logged in facebook on iphone 4?

[Iftikhar Mahmood]

I just want to ask, if you close facebook app does it log you out? Or you stay logged in and if you stay logged in does it use your data plan?

[The Drunken Fool]

It doesn't log out and if you have notifications set, it will use data sending those. it wont use much though.

[Greg]

You can set if you want to be logged out, and you can see that buy closing the app and opening it again.
If you open it, and you have to enter your password, you were logged out.

I don't exactly know what you mean with Data Plan, but the only thing the Iphone app does, when your not using it, but logged on is notifiing you of new Logs/messages