I have a 65 inch 4k vizio p series and it came with an aweful little remote and a tablet for all the major functions. Problem is that it wasn't showing my tv as an available device on the smart cast app!… so after about 4 hours of Google searching and YouTube, i found nothing of help. So, i pulled the power cable out from the tv itself for about a minute or two. Then plug it back in and make sure the tv dosent turn itself on when its plugged back in. (DON'T TURN THE TV BACK ON!) After that i launched the smart cast app and went to add new device. FINALLY it found my tv name and i was able to run through the wifi setup and what have you. After that the tv will turn itself on and a code will show up at the top of the screen and you put that into the app. It's impossible to miss when you're in the app cause you wont be able to go any further. Then it will probably say there is an update, and it took mine about 20 min to finish updating. Sometime during step 4 on the app, the “applying update" stage, the tv will cycle off and back on, but you should see a “updating your VIZIO smart cast home theater display” message with a percentage of how far along it is. Then once again the tv will do another power cycle. (You might even do this step a few times. Mine had three updates within step 4) step 5! Name your VIZIO smart cast device. Step 6 is terms of service, so just accept and move on to step seven. Step 7 is register your cast device. (First name, last name, email, phone, and postal code) FINALLY after all of that, you should be all set up!