If you can’t connect to Wifi on your Sony Tablet then follow this steps to solve this issue. wifi issues sony tablet S hard reset back to factory Turn off any encryption on your router at home If you can, try to -temporarly- turn off any security on your network, connect the tablet, let the upgrade happen and turn your security back on and restart both, router and tablet. Doing a Factory Reset has been reported by many people to fix this connectivity problem. Here is the link to the article about how to perform a factory reset on the Sony Tablet S http://techlivewire.com/1981/sonytablet-s-factory-hard-reset.html