Insert the USB into the TV's USB port, and it should prompt you to update, or you can start it via the Settings > Update menu.
Download Information of TV for Europe | TV | Digital AV | Support
If the number doesn't match the latest version listed on the official support websites, it's time to follow the steps to update your TV. v8-t851mgl
TH-43MX700H, TH-50MX700H, TH-55MX700H, TH-65MX700H, and Latin American variants like TC-43MX700P.
Usability
A high-quality USB 2.0 or 3.0 flash drive (formatted to ).
Regular updates (such as version 0011421) are released to improve overall system responsiveness and fix bugs like restored channel lists. Insert the USB into the TV's USB port,
Download Information of TV for Oceania/Asia/Middle East/Africa