A Unlocked security code (even have been change).
Use nokia security code generate lock.
1. Use *#06# to check IMEI(nokia phone only)
2.Insert IMEI then calculate.
3.Use the generate number to unlock the security code.
B Unlocked SIM card
Use Nokiafree unlocked code calculator v3.00b
1.Use *#06# to check IMEI(nokia phone only)
2.Insert IMEI .
3.insert Network.
4.Nokia Model
5.klik calculate.
6.Use the 15 digit number to unlock the sim card.
From jay....the code..