see this post
https://opengd77.com/viewtopic.php?f=7&t=2279
None of the current production Baofeng '1801' radios will work with the 'Open' Firmware developed and supported here.
The current production radios are being labeled DR-1801UV as yours and I have seen DM-1801v2 and other labeling. The bottom line is that ZERO of them will work with the Open Firmware.
AA3RP