What triggers the Internet Access permission, when it's set to auto on Android?

I have a project with it's own manifest, I've stripped out all permissions, as the client is afraid permissions will scare people off.

Network permissions are being added by unity anyway. I'm pretty sure I'm not using internet for anything, so I'm wondering what triggers the internet permission auto, so I can debug my code from there. I'm using N-GUI, maybe there's something in there?

Any help at all would be appreciated.