A:Answer Hi there! The WiFi that's built into the 4-Series TV is capable of transferring at rates of over 5Gbps, however you're always going to be capped based on things like your router, modem, and the connection speeds provided by your ISP. To stream live TV at 4k it is recommended you have a download speed of around 50Mbs, so the 4-Series is more than capable of providing that. You may want to check with some other devices (like your phone, for example) in a similar location to where the 4-Series would go to make sure that it will be able to get a strong signal. If you're having trouble with signal, I would suggest looking into a mesh router like the eero brand. I hope that helps, have a great rest of your day!