I am using Unity 4.1.2 I have downloaded the latest Facebook SDK for Android package for unity from the developer\'s site. The package file name is \"FacebookSDK-140401.uni
I faced same problem, working fine in unity editor, but not working in android phone. I was using game analytics sdk also, so I got two support-version in my Assets folder:
As not support more than one support-version, I deleted 2nd one.
For me it was the problem, FB.Init() was not working in phone.
When I delete First one and keep the 2nd one, Its worked!!!