Wammu is a free GUI program to manages contacts,todos, calendar and messages in your cell phone.Wammu runs both in Windows and Linux, it supports Nokia,Motorola,Sony Ericsson,Siemens,Samsung,etc.

Install Wammu
You can get Wammu from System->Adminstration->Synaptic Package Manager,or just run this command:

sudo apt-get install wammu

If want to keep updating to latest stable version,add PPA by:

go to System->Adminstration->Software Sources and in Other Software tab add ppa:nijel/ppa,then close the window and click reload.

Now,launch Wammu from Applications->Office menu,connect your phone and follow the configuration guide!

More information:http://wammu.eu/