Hi,
I have an E6410 with a DW5550 card fitted.
I had a few problems just finding and loading the drivers for the card but eventually I found them courtesy of Leon Bollerup,,,,thanks Leon!!
The problem I have now is that when I open Dell Mobile Broadband Manager I get the message '"Mobile broadband device is not communicating", Click on GPS and I get "Communication with module lost".
On the laptop, I connected the white connector to 'Main' and the black connector to 'Aux'.
The sim card is installed.
.....but no joy!
Ian