I Bought A Blackberry 8830 From Ebay Which Is Registered With Sprint But The Phone Is Unlocked. I Leave In Greece So I Am Using A Greek Service Provider Called "wind". The Phone Has Saved The Old Number Of The Person Who Had The Phone In Its Memory.

How Can I Remove The Old Number And Put My Greek Number.

Also When I Try To Make A Phonecall If I Dont Use The Area Code Of Greece The Phone Automatically Places +1 In The Number Which I Dial Which Is The Us Area Code.

Please Help Me.