A short video of how to unlock a Baofeng UV-82 to transmit from 136-174 MHz and 400-520 MHz.
The same process also works with the Baofeng UV-9R. I have tested and confirmed this with my own UV-9R.
Thanks to YouTuber NotaRubicon Production for the inspiration to try this on my UV-82. Check out his video here about how to unlock the Baofeng UV-5r: https://www.youtube.com/watch?v=2sg3RJf1ZEA
Disclaimer: This worked on MY radio and results may differ on YOUR radio. This was a technical experiment for myself and nothing more. Never transmit outside of the frequencies in which you are licensed or for which your radio is FCC certified for.