This feature is only available on VIZIO SmartCast TVs running the latest firmware.
Press the V key on the TV remote.

Select System from the menu.
Then select Check for Updates.
The TV will start checking for updates.
If a new update is available, confirm you want to install it and wait for the process to complete.
Do not turn off the TV during the update process.
The TV will first download the new update, restart, install the update and restart again.
After the second restart the TV will be updated and ready to use.