SIM PIN Challenge

SIM PIN Challenge.Back in 2005 I was at a presentation by a SIM manufacturer when the presentation turned to CHV (Card Holder Verification), the correct technical term for PIN used for SIM Cards..The presentation had reached the part "Verifying the CHV" and went on to record:.~ To verify PIN, the verifyCHV APDU is used.....A0 20 00 CHVNum 08 PINValue.~ The message sent from the phone to the SIM