Block access to Facebook using TMG 2010

Dear All,

I made a rule in TMG 2010 to block Facebook, it's working fine if i try from browser, but when i try from facebook app installed in my smartphone, it works...

I need to block it from whevery where, please help
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Your smartphone, does it use the network where TMG is running/filtering?
Does the rule you setup apply to the wifi connection or is that on a separate VLAN to which the rule applies?

What is your environment? Look at the management options of the various smartphones and how those can be managed.

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