Here is the best trick for mobile to be in Offline mode and See which Friends are online form 'Mobile Phone' without any online third-party online App.
- First Login in Ur Mobile Browser and Turn Off your Facebook Chat so that u seems Offline.
- Now Download Facebook Official app from www.facebok.com. It Must Not be Chat Application it Must Be Facebook Official App.
- Just Done Friends. You Can See your friends Online In your 'Messages' option of App. But you are offline for them.
Note: It is for Simple Phones and some smart Official Apps Support It Directly