I have had a problem with the galaxy note 4 . The phone will not connect to any wifi network after Being in sleep mode.I have it set to keep wifi always on , I have tried to forget the connection info and reConnect. I have done a full factory reset and it Still happens. I have restarted the router and have turn Both off and reseated them as well, I rely on my wifi as i am a heavy data user and not being able to say connected is Causing me to use Too much of my data plan,