I have an Android with LTE service. Model LML413DL. Since yesterday, I can no longer maintain a steady connection to my in-home WIFI. I have done a factory reset. And a network reset. I have restarted my modem/router several times and attempted to connect via WPS several times. My phone keeps searching for WIFI networks and the bars icon has a padlock attached to it, even when I manage to connect. When I do connect, it holds for a few seconds, and then fails. Then reconnected.