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

2. *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

3. *#0000# Displays your phones software version,

v 5 .0737.3.01 (SoftwareVersion)
13-09-07 (Software ReleaseDate)
RM-84 (Compression Type)

4. #pw+1234567890+1# Provider Lock Status.

5. #pw+1234567890+2# Network Lock Status.

6. #pw+1234567890+4# SIM Card Lock Status.

7. *#67705646# Removes operator logo on

8. *#73# Reset phone timers and game scores

9. *#7760# Manufactures code

10. *#92702689# (to rember *#WAR0ANTY#)

11. *#94870345123456789# Deactivate the PWM-Mem

12. 12345 This is the default security code press and hold # Lets you switch between lines.