TYT TH-UV8000D frequency bands mod
I'll probably update this procedure with a nice PDF document, as usual, but for now you'll have to settle for this.
I don't know why nobody else already shared this mod, but it has to be shared!
First of all, I hope you did not already spend hours filling the miserable 128 channels memory, because you'll lose all of it.
Open the genuine TYT TH-UV8000D CPS and click "Setup" -> "Model information".
Set values that are much lower and higher than the preset limits, or just copy what you can see on the picture below :
Then click "Ok" and accept to clear all previous data.
Finally, click "Program" -> "Write to radio".
I did not test how this transceiver behaves on these new frequencies yet.