Windy

I've been with cingular on my father's name for more than 3 years... my 2 year agreement has been over for a while... Im trying to get another free cell phone b/.c mine is old and cannot afford one.... I also want to start a new 2 year contract to get a new phone too but I also was wondering if I can keep the same account to my name instead oepenign anew one... will I have to pay deposit and all that .......
Does my dad have to call and tell them or can I do it myself since my name is on the account too... I don't talk to my dad can I just do it thru cingular...