Press *3370# to access reserve mobile phone battery power

Is this true ?

You can press *3370# to access reserve mobile phone battery power.

Answer

Apparently the code *3370# activates the Nokia Enhanced Full Rate Codec (EFR), this means that the Nokia cell phone has better sound quality, but with a shorter battery life.

To disable this (EFR) feature, the code is *#4720# which reduces voice quality but enhances battery life.

Links:

• Nokia.com: http://discussions.europe.nokia.com
• Nokia.com: http://discussions.europe.nokia.com/…/Useful-codes