Comment 74 for bug 449394

My modem is a E220, i had the same regression of the problem in 10.04. Updating the firmware fixed the problem for me. I live in New Zealand and the Vodafone site pointed me here to download the firmware.

http://www.business.vodafone.com/site/bus/public/enuk/support/10_productsupport/vista/30_modem/p_modem.jsp