From this page you can get the application notes, manuals and the firmware. All downloaded files are zipped. You might find newer firmware from our competitors who are still selling these products.
All
App
Notes
AT-Options
Virtual
Driver
Baseband IC Firmware
D868UV
Firmware
V2.40
Manual
Update
Utility
D878UV
Firmware
V3.02N
D87UVII
Firmware
V3.02N
D578UVIII
Firmware
V2.04
Manuals