I have a URU800 which I've configured to connect to my local router and it works fine ... but then randomly about every 6 weeks or so ... it doesn't. I at first reconfigured the network settings again and that didn't work. BUT I found that disconnecting the power cable at the back of the TV and waiting 30 seconds before reconnecting the power, I could get the Wi-Fi to work again with the existing configuration. I've seen other posts talking about manual IP set up ... which I tried without success. I saw a post about doing a reset and I tried that, and that didn't work. I tried connecting to 5 Ghz and that hasn't helped. I suspect from reading on other support forums that it has something to do with a memory leak on the TV, which eventually means the OS runs out memory and can't process the Wi-Fi connection. By disconnecting the power it flushes the memory and we're ok for another few weeks. I just wondered to the Samsung techs that may lurk here ... if this is a valid hypothesis?