How to Determine if Your BlackBerry is Unlocked

A. On your BlackBerry, go to Options > Advanced Options > Sim Card

B. At that screen type MEPD (see note below) on your keyboard. A new menu will pop up.
If your BlackBerry has a SureType keyboard (71xx and 81xx devices) you will need to double-tap the P, so the actual keys entered become M E P P D.

C. Look for Network in the list

D. If your device is unlocked, it should say “Disabled” or “Inactive”. If it says Active, it’s still locked to that carrier