The use of a mobile phone for Internet connections from another machine is limited by both the phone and by the phone operator. It is not a feature or function of Ubuntu.
If your phone supports tethering and if your operator allows it on your tarrif, then you will be able to use it to allow an Ubuntu PC to access the Internet.
Most modern phones that allow tethering will do so over either WiFi and/or Bluetooth. Some phones will allow it over USB.
The easiest way by far for Ubuntu will be WiFi as there are no device issues to worry about - assuming you have WiFi set up on the Ubuntu PC.
For your speific phone, you need an add-on application called "JoikuSpot" to allow WiFi tethering. It is free.
Please do, however, check that your operator allows this in the terms of service otherwise you will be in danger of being disconnected or facing a large, unexpected bill.