Samsung Blackjack SGH-I607 Smartphone "mcc mnc code" Questions

I have the unlock code from at&t but it says :You entered Incorrect MCC/MNC contact service provider ,they will provide you the codes

MCC , MNC code no .. i bought this set from U.S.A. So plesae help me that would be great contribution towards me. Can you send me in my email add: [email protected].. Thank You Hari Rana Magar wat

code MCC/MNC wat is this code? i need the nhe setwork code to unlock a samsung phone black jack please help