Problems signing in with Facebook on some phones <p>I have gotten reports from some people that they cannot log into my app with Facebook. Most of the reports come from users with Samsung phones. I have asked them to reinstall both my app and the Facebook app, and try with and without the Facebook app installed but that does not seem to help. My app is using Single-Sign-On.</p> <p>I have tested with multiple Samsung phones and I have never been able to reproduce this problem. Does anyone know how this could be solved?</p>