I am on Ubuntu 10.10 using a Huawei E160 USB modem and experience the
same bug. (Note that in lsusb the E160 is shown as 12d1:1003 and is
named E220/E270, so apparently it is technically identical to the E220.)

If I have my device plugged in when booting, it shows up in the network manager 
applet ready for use.
If I plug it in only after booting, I have to manually issue the 'modprobe 
option' command to get it working.

I have both usb-modeswitch and usb-modeswitch-data installed, but I did
not see any effect on said behavior with manually running usb-
modeswitch.

What I have found out respectively can confirm so far:
If I have the device plugged in at boot time, among others the modules 
usb_storage, option, usb_wwan and usbserial are loaded.
If I plug in the device later, only the usb_storage module gets loaded, any 
only with the command "modprobe option" the other three modules (option, 
usb_wwan and usbserial) get loaded, to achieve the same list of loaded modules 
as when booting with the device already connected.


If it helps I can attach all data similar to those Bartosz has sent or any 
other system output if requested.

uname -a:
Linux burkhard-desktop 2.6.35-25-generic #44-Ubuntu SMP Fri Jan 21 17:40:48 UTC 
2011 i686 GNU/Linux

cat /proc/version_signature:
Ubuntu 2.6.35-25.44-generic 2.6.35.10

lsb_release -a:
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 10.10
Release:        10.10
Codename:       maverick

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https://bugs.launchpad.net/bugs/565058

Title:
  Lucid: hotplugging Huawei E220 doesn't load 'option' module

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