This how I did it for an E220
Click on the network icon at the top right of the screen
2) Go down to Edit Connections....
3) Click on Mobile Broadband
4) Click Add
You should see a setup dialogue with the option to use HUAWEI Technology HUAWEI Mobile. Follow the instructions in this setup remembering to double check the information you select such as your provider, as you said it is o2 and the type of plan you have wither pay as you go or contract etc.
Once you have done this click save.
To contact O2 click "Contact us" at the bottom of any O2 page, and click the service you need, or wait for "Live Chat" to appear.
Mobile since 1993
