How To Identify Operator 8290

[trentini]

I Have A Bunch Of Locked Nokia 8290 Gsm Cell Phones That I Need To Know The Operator To Get The Unlocking Codes. But I Cannot Identify De Operator/carrier Because They Have Nothing On The Faceplate. Is There Any Way To Find The Operator By Any Numbers.. Inside, Outside ?

Thank You !!

[browntoa]

buy a cheap mbus/fbus data cable and read the code with Rolis 1.9