usb 3g modem does not switch to modem mode when plugged in but automatically switches to storage mode

Bug Description

Binary package hint: udev

3g usb modem (Huawei E11500) should automatically switch to modem mode but instead it goes to usb storage mode when plugged in during computer use. This means I have to restart the laptop with the dongle plugged in, from start, before the OS recognises it as an internet dongle.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: udev 151-12
ProcVersionSignature: Ubuntu 2.6.32-24.39-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic i686
Architecture: i386
Date: Tue Jan 4 11:59:51 2011
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
MachineType: Acer Aspire 5738
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-generic root=/dev/sda3 loop=/hostname/disks/root.disk ro quiet splash
ProcEnviron:
 LANG=en_GB.utf8
 SHELL=/bin/bash
SourcePackage: udev
dmi.bios.date: 04/14/2009
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.06
dmi.board.name: JV50
dmi.board.vendor: Acer
dmi.board.version: Rev
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.06:bd04/14/2009:svnAcer:pnAspire5738:pvr0100:rvnAcer:rnJV50:rvrRev:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 5738
dmi.product.version: 0100
dmi.sys.vendor: Acer