unlocking safaricom bigbox

does anyone know how to unlock safaricom big box so that i can use other networks

Umepoteza keys? So uite wankanyama avunje hio lock.

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Explain how this system works and i will help you out. [SIZE=2]I also have one that i have tried all things to unlock

[ATTACH=full]136023[/ATTACH] [/SIZE]

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