When developers claimed v17rar was "better" than its predecessors, they typically meant it offered:

The unique 15-digit serial number of your phone.

Early calculators (v10–v15) were designed purely for Java-based BlackBerry OS (Curve, Pearl, Bold). claims to support the unlock algorithm for BlackBerry 10 devices (Z10, Q10, Q5, Classic, Leap) and even early PlayBook SIM unlocking. If you have a Q10 stuck on Verizon or EE, older calculators won't work. v17 theoretically does.

Click the calculate/generate button to receive your MEP2 code (network lock).

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Unlocking your own phone is generally legal, but always check local regulations.