Advanced Nokia Secret Codes - Learn Coolest Computer And MObile Hacking Tricks

There may be 4 different locks on your Nokia phone namely COUNTRY LOCK, NETWORK LOCK, PROVIDER LOCK and SIM LOCK.
Following is the code-format to be typed at standby screen to display status of various locks of your phone
#pw+(MASTERCODE)+(Y)#
To get “w” press "*" THREE TIMES
To get “p” press "*" FOUR TIMES
To get “+” (Plus sign) press "*" TWO TIMES

MASTERCODE is 1234567890 and the value of “Y” is Number 1 to 4, thus to get lock info press following codes at standby screen
#pw+1234567890+1# Displays PROVIDER-LOCK STATUS
#pw+1234567890+2# Displays NETWORK-LOCK STATUS
#pw+1234567890+3# Displays COUNTRY-LOCK STATUS
#pw+1234567890+4# Displays SIM-LOCK STATUS

A trick to bypass the Service Provider lock in Nokia 16xx/21xx/31xx/51xx/81xx series phones
1. Insert SIM of different service provider
2. Power On the phone and press the UP VOLUME key for 3 sec. Then release it, the phone asks for PIN CODE?
3. Press the "C" key
4. Then Press * and wait until it disappears and appears again, then press * one more time and press 04*(Your PIN)*(Your PIN)*(Your PIN)# (In the given sequence) and you are done. Now you can use the SIM of other provider. However each time the phone is turned OFF it resets the lock, so the above procedure needs to be repeated each time you'll restart the phone. Note: ensure that PIN CODE is on before doing the above (On it through Settings/Security Menu).