3120 mobile get locked

i had put the security code 3 times wrong then it asked for puk number and again i put the puk number wrong and now my sim is blocked(sim rejected) is there is any way to unlock the sim. i still can browse the phone through my computer through DKU-5 cable. is there is any software through which i can unlock the mobile.

These are two separate issues:

  1. Unlocking a SIM Card.
  2. Unlocking your mobile.

The answer to your actual question is: NO. Yo can not unlock a blocked SIM Card, even the SP changes the SIM, not unlocks it. Unlocking a mobile is quite another issue.