Dear friends,
finally we have good news. We was successfull in finding a method for correct DB2020 unlocking via codes (red CID49/51). Unlike other tools, this procedure will not damage phone security zone, and therefore it does not require presence of patched firmware for the phone to remain unlocked. Reflashing the phone afterwards does not cause the phone to relock itself.
This release will be available by tomorrow (CET) for all users with CardID ending by "-07" for free.
BR,