How do I unlock my BlackBerry? - BlackBerryFAQ
specifically
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BlackBerry 6xxx 7xxx: ie 6230, 7100, 7290 etc. Unlock Code Instructions
1. Select Options menu on BB.
2. Select SIM CARD menu. To be able to see this you have to type this on the keypad on phone : (TEXT WILL NOT APPEAR ON THE SCREEN until you enter the unlock code)
3. Type 'MEPD' for all models, except 7100 in which case in case use 'MEPPD'.
4. Usually you should see "active" NET lock. In order to disable this lock, type 'MEP2' respectively ('MEPP2' if phone is 7100)
5. The BB will ask for a code. NOTE: You must use the "alt" or "shift" key to enable numbers so example would be: m-e-p-"alt key"-2 Now you should see the place to enter your net unlock code.(if not, you didn't type in mep2 or mepp2 properly.)
6. Here you must enter the "NET Unlock Code" that you have.
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for the suretype model make sure you give it a second between typing MEP P ALT 2 so you dont use multitap