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*3370# This Nokia code activates Enhanced Full Rate Codec (EFR) - Your Nokia cell phone uses the best sound quality but talk time is reduced my approx. 5%. #3370# This code 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# With this Nokia code you can deactivate the 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.

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15y ago

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