Google Full OTA Flash
The Google Full OTA Flash file is a type of firmware package developed by Google
that is also often used on GoogleTV sets by Hisense. For our
purposes, this guide focuses on how to use the files on this site, as
Hisense tends to package them a very particular way. That process
is as follows:
1.) Extract the zip file to your desktop. Read the "Update
Procedure.txt" included inside for proper guidance. Follow it,
don't use what you've known in the past.
2.) On 55" U8N/U8K sets, be sure and use the top blue USB port
above the HDMI ports (other sets use any USB until it works), and always format your drive as FAT32.
After you have finished this, you may want to go offline or disable OTA updates.