Huawei E173 modem stopped working after upgrading on precise

Hello, I have a Huawei E173 modem that worked fine on Ubuntu 11.10. But after I upgraded on precise, there is no prompt for PIN and nothing appears in the network menu.

Command lsb_release -a; uname -a; lsusb output:

LSB Version: core-2.0-ia32:core-2.0-noarch:core-3.0-ia32:core-3.0-noarch:core-3.1-ia32:core-3.1-noarch:core-3.2-ia32:core-3.2-noarch:core-4.0-ia32:core-4.0-noarch
Distributor ID: Ubuntu
Description: Ubuntu 12.04 LTS
Release: 12.04
Codename: precise
Linux Comp 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:52 UTC 2012 i686 i686 i386 GNU/Linux
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 04f2:b175 Chicony Electronics Co., Ltd 4-Port Hub
Bus 006 Device 002: ID 0489:e011 Foxconn / Hon Hai
Bus 002 Device 005: ID 12d1:1c08 Huawei Technologies Co., Ltd.

So is there any way to make the PIN prompt and other things appear again?
Thanks