Help using i860 on boost

[chillspider015]

i recenctly bought an i860 from someone and the phone isnt locked untill i put my boost sim into it..i know lots of people who had the same nextel phone on boost network i dont understand why mine wont work i talked to nextel repair guy at the store and he told me i need to boost sim i might have messed up the other one transfering to all the different phones. so i bought new sim and same thing still locked and the temp 0000 and 00000 security codes dont work .....if anyone else had this problem and knows how i can go about fixing it besides getting a new phone i dont need the humor please message me or reply to this post thnks !!!!