After some basic Nokia secret codes (1 and 2) here I present some advanced Nokia codes and related tricks:

Following is a method to check the status of 4 different types of phone locks. Be careful however as entering the wrong number 3 times will block the phone for good.
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


To get “w” at stand by screen 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

Insert SIM of different service provider

Power On the phone and press the UP VOLUME key for 3 sec. Then release it, the phone asks for PIN CODE?

Press the “C” key

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).
General Nokia codes are here
Checkout the codes for Nokia 1600, 2600 screen upside down trick here


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