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NOKIA::. TIPS & TRICKS
These Nokia codes will work on most Nokia Mobile Phones,
Code Description
*3370# Activate Enhanced Full Rate Codec (EFR) - Your phone uses the best sound quality but talk time is reduced my approx. 5%

#3370# Deactivate Enhanced Full Rate Codec (EFR)

*4720# Activate Half Rate Codec - Your phone uses a lower quality sound but you should gain approx 30% more Talk Time.

#4720# Deactivate Half Rate Codec.

*#0000# Displays your phones software version, 1st Line : Software Version, 2nd Line : Software Release Date, 3rd Line : Compression Type.

*#9999# Phones software version if *#0000# does not work.

*#06# For checking the International Mobile Equipment Identity (IMEI Number).

#pw+1234567890+1# Provider Lock Status. (use the "*" button to obtain the "p,w" and "+" symbols).

#pw+1234567890+2# Network Lock Status. (use the "*" button to obtain the "p,w" and "+" symbols).

#pw+1234567890+3# Country Lock Status. (use the "*" button to obtain the "p,w" and "+" symbols).

#pw+1234567890+4# SIM Card Lock Status. (use the "*" button to obtain the "p,w" and "+" symbols).

*#147# (vodafone) this lets you know who called you last.

*#1471# Last call (Only vodofone).

*#21# Allows you to check the number that "All Calls" are diverted to.

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