NetworkManager/Sony Ericsson MD300

I think?.. i’ve been redirected back here from the Wireless sub-section?
I must use the stated hardware to connect to my Claro broadband account here in Brazil and need to know how to set it up via the Network Manager configs, what additional drivers I might need, where to get them from and how to install.
Sorry to appear ignorant but although I have an in depth knowledge of Windows my migration to Linux is all new ground! The stated device is a USB Wireless Modem but is only supported for Windows and MAC platforms. Any offerings will be greatly appreciated.