bsd

Although generally speaking I’m all pro linux and use it whereever possible – and consider it the best OS for networking encountered by me so far – I was not able to make my internal 3G modem work properly with Ubuntu yet. Of course I managed to have it load the right device drivers and I’m able to establish connections and to surf the internet – but unlike windows, ubuntu refuses to crank up the speed to HSDPA, and despite my patching (and recompiling) of the “usbserial.ko” and “sierra.ko” driver modules I was only able to get a downlink speed of 800KBit/sec at most. The same modem with WindowsXP though achieved between 2.2 and 2.8 MBit/s at the same daytime, causing me quite some frustration (I had bought the modem card because it was claimed as being fully compatible with linux, even with linux drivers supplied by manufacturer, mind you) and I started using WinXP more frequently again due to this issue.

The rest is here:
HowTo: "Qualcomm 3G ICON 210" and Ubuntu