I had purchased a T-Mobile RAZR V3; I had it unlocked to work with Cingular. After unlocking the phone works fine but the battery life is only 8 to 10 hours. I replaced the battery with the same results. Phone charges just fine. I am using working battery from another phone. I put this battery in my existing phone and it works fine, 36 to 48 hours on a charge. It must be something wrong in the phone’s program. I did a master reset to put all programs back to factory. But still problem persists. Why is RAZR V3 battery life short after unlocking it? What can I do about it? Please help. Thanks.