Go to My Computer -> Properties -> Hardware -> Device Manager
Disconnect the USB modem.
Right-click on each entry in Universal Serial Bus controllers and choose “uninstall”.
Restart the PC.
Re-connect the USB modem to the first USB plug. Windows will initialize the device, pay attention to all the messages it displays at the lower right bottom of your screen. It will most likely initialize the device as an USB mass storage device, a CD-ROM, etc. AND hopefully as a “Data Interface”. If it never shows the mesage for data interface you have to try the device on the next USB plug.
If Windows brings up an installation dialog for the data interface, allow it to get the drivers from the internet, but tell it to also check in
If the Device Manager doesn’t list Huawei in the Modems and Ports section, you won’t be able to open a connection. Start all over with this guide :-(
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The problem of Win7, Win8 and Vista is that sometimes it only recognizes Huawei devices only as mass storage device. What you need to do then is, identifying which mass torage device is the Huawei modem and then updating the driver and chosing "generic USB host controller" from the driver library. Afterwards all the other components of the Huawei modem will be recognized and Mobile Partner will detect the modem.
Here are some instructions:
Work-Around: You need another PC/Laptop and a USB Pen/Key Drive to do this:
1) Connect the E220 to your XP PC/Laptop
2) Open the Device Manager (in the Control Panel)
3) Look for the USB Mass Storage Device in the "Universal Serial Bus controllers" Section
If there are more than one USB Mass Storage Devices, right click each one,
select Properties, Details and then "Children"
If it says "Huawei" somewhere inside the Value, you found the right one.
4) Right click on the Mass Storage Device and select "Update Driver Software"
5) Select "Browse my Computer"
6) Select "Let me pick"
7) Uncheck "Show compatible devices"
8 ) Select "(Generic USB Host Controller)" in the Manufacturer Tab
9) Select "USB Composite Device" in the Model Tab
10) Finish installing the Composite Device driver
11) Afterwards, Vista will add another USB Mass Storage Device, and if you are lucky, also 2 "Data Interfaces"
12) If it doesn''t detect the Data Interfaces, disconnect and reconnect your E220.
13) Vista should now detect all the E220s Data Interfaces
14) When asked to insert the disk containing the drivers, choose "I don''t have the disk" - however Windows may also detect those drivers automatically
15) Enter the C:\Program Files\Mobile Partner\Drivers\WinVista folder
16) Repeat Step 14&15 for the second Data Interface
21) Start Mobile Partner and connect