For anyone plagued by constantly disconnecting from WiFi - try re-entering your Router's Password (it may have become corrupted, or, like me you may simply have entered the wrong password!) After a Factory Reset I had to re-enter my WiFi Router's password which I did several times with no joy. Only when I got out my trusty magnifying glass did I discover that the first 8 was, in fact, a 6. Problem solved!! Red Face remained.