How to recharge nokia phone without any charger

Imagine ur cell battery is very low, u r expecting an important call and u don’t have a charger.

     Nokia instrument comes with a reserve battery.
To activate, key is “*3370#”

     Ur cell will restart with this reserve and ur instrument will show a 50% increase in battery.

     This reserve will get charged when u charge ur cell next time.

     *3370# Activate Enhanced Full Rate Codec (EFR)-Your phone uses the best sound quality but talk time    is reduced by 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