These Motorola codes will work on
most Motorola Mobile Phones, however we accept no
responsibility of any kind for damage done to your phone
whilst trying these codes.
For checking the International Mobile Equipment Identity (IMEI
 119  1 
Activate Enhanced Full Rate Codec (EFR) - Your phone uses
the best sound quality but talk time is reduced my approx.
 119  0 
Deactivate Enhanced Full Rate Codec (EFR).