I don’t understand .. how can i do ?

Hello, i have a little question for you,all.. i am using Ubuntu 10.10, Sabayon 4.5 & Fedura 7 . But, i don’t know how to connect to internet using a GPRS connection in Linux ? Every time it needs mobile drivers. so, how can i get those drivers & from where? My phone sets are Nokia 72, Nokia 5230 & Lemon iQ 707. Hope you can help me.