Dose anyone know any model of 3G/4G Modem modem that works out of the box with DB410c on Android ?
I have tested a ZTE MF110 and dident seem to work.
I doubt you'll find something that is plug and play... Android isn't really designed for systems where the modem isn't built in.
However with a bit of effort you might be able to get a dongle to work without recompiling anything. You would have to combine the information at https://wiki.archlinux.org/index.php/ZTE_MF110/MF190 about the ZTE modem with one of the tutorials about how to integrate a USB modem with an Android tablet. Google seems to rather like http://forum.xda-developers.com/showthread.php?t=2172914 . I've not tried it but the advice on both these links appears to be consistent. Both propose the same three steps albeit in different ways for the two OSs: enable just the modem component, force usb_serial to recognise the modem, and configure PPP.
If you're not interested in tight OS integration you can always use the pppwidget3 http://www.draisberghof.de/android/pppwidget3.html . bought to us by the same people ( person? ) who did usb_modeswitch.
I can't seem to find a link on the developers website for a non playstore download but the apk is easily acquired from other fairly reputable sources