1 It cracked div read codes and unlcok the phone. Pull the batery out.
2 power on the phone and try lock the phone it same codes. Pull the batery out.
3 Connect phone to cable and make reset security code.
4 power on phone and put unlock codes again.
5 Security code now is 0000

Tested in T65 and t100 post your results
Best regards From Portugal
Nokall