First post. I have a home wifi network with no Internet connection (rural area) I use it to watch movies, back up device photos at night, etc. I just upgraded to 5.1.1 from KitKat. Now, wifi will connect to home network for 30 sec then disconnect because of no Internet connection. It will then revert to mobile data. Tried turning off mobile data but no luck. Wifi still disconnects. Looked through advanced wifi options but no luck there either. Thanks for any help!