Wherw can be downloaded free calculator to unlock phones?

[mafaza3]

Hi,
What kind of calculator I need to calculate unlock codes for the phones?
And where can I download it for free?

Thank you.

[PremierD]

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[mafaza3]

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[Canker_Canison]

The software I use is free to download. But it won't work unless you have paid for a box & subscription to use it.