D-bus devices cannot produced by NetworkManager when Huawei EM660 Module already is in

[Wei Ye <trojanwei gmail com>]

One questions:

When the HuaWei EM660 CDMA card is already inserted into PC, that is 
$ls /dev/ttyUSB*
/dev/ttyUSB0  /dev/ttyUSB1  /dev/ttyUSB2  /dev/ttyUSB3  /dev/ttyUSB4
the /dev/ttyUSB1  /dev/ttyUSB2  /dev/ttyUSB3  /dev/ttyUSB4 for CDMA USB modem of EM660

if the card is pluged out, then plugged into the PC,
the NetworkManger can detect, and report a new D-bus device, for examples, /org/freedesktop/NetworkManager/Devices/2.

But if the reboot the PC, the card is still in the PC, no the action of plug out and in,
NetworkManger cannot the produce the D-BUS /org/freedesktop/NetworkManager/Devices/2.

also 
$sudo usb_modeswitch -v 012d1 -p 1404 -P 1404 
$modprobe usbserial vendor=0x12d1 produce=xxxxx
has done, it is not useful.

Why? If the action of plugging in and out is not done, how can write the script to realize it to produce card D-bus /org/freedesktop/NetworkManager/Devices/2 ?

Thanks