Found a solution in the German Debian forum: http://debianforum.de/forum/viewtopic.php?f=30&t=122512
network-manager > 0.8.0.999 seem to require ppp 2.4.5 (which is in Debian Sid) to work with the Huawei-Modems. I installed 2.4.5-4 (which has no problematic dependencies) and it worked again. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
