I got litle trouble after upgrading to karmic koala, since the upgrade I’ve had problems with usb-storage. After i plug the device, system not mount anything. Actually this issue happened in Jaunty, but finally working after i did litle trick, add this line into /etc/modules :
usb-storage option_zero_cd=2
But in Karmic, it doesn’t work as i expected . This problem happened because device id 05c6:1000 is not initialized correctly and stopped with result :
[ 144.565583] usb 2-1: configuration #1 chosen from 1 choice [ 144.576078] usb-storage: probe of 2-1:1.0 failed with error -5
So i guess this happened in all devices which share these IDs (used by a Qualcomm chipset for storage device)
I wish i can find a solution immediately, Damn, i’ts so annoying if i remove first memory card from my mobile phone, then connected through Card Reader just for data exchange
Me and my chaotic life 
I got samsung soul b and haven’t got significant trouble with its storage mode or modem mode at Jaunty. The only problem I got with it is the technology said 3.5 G, but its speed is still worse than phone line internet.
Yes, both function are worked in jaunty, but thanks god, modem mode still working in karmic. so i still can connected to internet. have you ever tried lock connections to hsdpa mode, i heard that there is AT command to do this, but i haven’t try. you can ask uncle google bout this 😀
I’m STILL looking for a solution to this. I’ve been able to access mass storage in Jaunty, but now I get nothing in Karmic. I’ve found this proposed bug published, but it’s not gaining much steam. I’d love to get more info on this. Launchpad Bug #477031
Cheers.
Yeah, i hope we will have good new about this, i don’t want to going back into lowest version hahaha