Security code my no. is9312747307 by mistake my pin is blocked and now it is displaying enter pin code and that i dont know??i am using nokia 6275 handset right now plz help me out

Complete information :
The SIM card protects your subscription and not the phone from unauthorised users. If you change SIM cards you can still use your phone with a new SIM card. Most SIM cards are blocked at the time of purchase. If your SIM card lock is on you have to enter your PIN (Personal Identity Card) every time you turn on the phone.

If you enter the wrong password three times in a row the SIM card gets blocked. This is indicated by the message PIN Blocked To unblock this you need to enter your PUK

Note:
card (Personal Unblocking Key). Your PIN and PUK is supplied by your service provider. You can edit your PIN and select a new four to eight digit number

• If the Message Codes do not match appears when you edit your PIN you entered the new PIN incorrectly.
• If the message Wrong PIN followed by Old PIN appears then it means that you have entered the old PIN incorrectly.
  

1. When PIN Blocked appears enter your PUK > OK
2. Enter a new four to eight PIN > OK
3. Re-enter the new PIN to confirm > OK
   

1. > Settings > the General tab > Security > Locks > SIM Protection > Change PIN
2. Enter your PIN > OK
3. Enter a new four to eight digit PIN to confirm > OK
   

1. > Settings > the General tab > Security > Locks > SIM Protection > Protection and select On or Off
2. Enter your PIN > OK
   

Flash the phone