What is the usual battery life of this model? Mine is on O2 but I have to
charge it about every 4 or 5 days and I only ever use it for
sending/receiving texts. My son has an E720 and that lasts about 2 weeks or
longer on a full charge. My phone is unlocked and on O2 network. Someone
told me that EFR might be enabled or something. How can I tell?
Linear Mode
