help with this nokia
 

i have one nokia wich i dont now nember model "NHE-1XN" we can have a solution to unlock it? inside phone i dont found eprom but we finde ATMEL AT28c64b. if it can be unlocked by repregrammin atmel some one can give me the dump?
IMEI is 490031100194430.
phone asck first for security code i try 1234,12345;0000;00000 but noting.Think you. :(