Few days before I posted the secret codes for Android phones and here I am sharing a list of secret codes of the Nokia phones.

You can use these Nokia phone secret codes to use some unknown features of your Nokia phone and to check various information about your Nokia phones.

Nokia Phone Secret Codes
Secret Codes For Nokia Phones

*3370# - To activate Enhanced Full Rate Codec (EFR) for better quality sound but it reduces the battery performance

#3370# - Deactivate Enhanced Full Rate Codec (EFR)

*#4720# - To activate Half Rate Codec

*#4720# - For deactivating Half Rate Codec

*#0000# - To know about the your Nokia phone's software version. The data is represented as given below

1st Line : Software Version, 2nd Line : Software Release Date, 3rd Line : Compression Type

*#9999# - Alternate code to check the software version of Nokia phones

*#06# - To check the International Mobile Equipment Identity (IMEI Number)

#pw+1234567890+1# - To check Provider Lock Status. (Use the “*” button to obtain the “p,w” and “+” symbols)

#pw+1234567890+2# - To know the Network Lock Status

#pw+1234567890+3# - To Check the Country Lock Status

#pw+1234567890+4# - To check the SIM Card Lock Status

If you know any other secret codes for Nokia phones then, please share them in the Comments section. Thanks :)

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