NM doesn't find 3G modem again after disconnect+connect -- Huawei 12d1:1404

network-manager: 0.9.4.0-0ubuntu4.1
dmidecode -s system-manufacturer
Acer
dmidecode -s system-product-name
Aspire 5738
dmidecode -s system-version
0100

uname -a
Linux 3.2.0-27-generic #43-Ubuntu SMP Fri Jul 6 14:25:57 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Built-in modem
Bus 002 Device 004: ID 12d1:1404 Huawei Technologies Co., Ltd.

Steps to reproduce:
*Start computer (3G is not enabled automatically)
-nm-applet doesn't show any 3G-APN (as expected)
*Press "3G" -hardware button (for enabling)
-3G-led will go on
-nm-applet sees APN
*connect to the APN
-connection will work
*Press "3G" -hardware button (for disabling)
-3G-led will go off
-nm-applet doesn't show APN anymore (as expected)
*Press "3G" -hardware button (for enabling)
-led will go on
-nm-applet doesn't show APN (not expected)

----
There are some warnings when toggling "3G"-hardwarebutton: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1034562
----

After connecting broke (and 3G led is on) I tested:
sudo killall NetworkManager ; sudo NetworkManager ; nm-applet
Then I can see the APN, but selecting it cause crash and crash-handler will be started, but then there are no Internet connection to send it. Error in terminal is:

** (nm-applet:2319): WARNING **: async_got_type: could not read properties for /org/freedesktop/NetworkManager/ActiveConnection/5: Method "Get" with signature "ss" on interface "org.freedesktop.DBus.Properties" doesn't exist