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.
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!