Try to powercycle first your wifi route by unplugging it from the socket for 2 mins. once you plugged in again the router, restart your J2 while router is restarting too. and then from wifi settings, forget the network and reconnect again .I have updated my device about 267 MB, after that I factory reseted it. After reseting, I am facing a problem with my device. My device turnes off automatically at any instant. Sir, please give me the solution for it. Why is it occuring?