Hi dear,
Garmin GPSMAP 66 serie needs a Firmware Patch to read Unlocked Maps.
There are 3 different Device of GPSMAP 66:
- Garmin GPSMAP 66s/66st (HWID = 3028)
- Garmin GPSMAP 66i (HWID = 3284)
- Garmin GPSMAP 66sr (HWID = 3694)
You must tell us the correct HWID of your Device () and then I will lead you in the correct direction
:lol: