sand_man
Honorary Master
Not sure about 2G using more power than 3G. I think what saps power is the phone searching for signal so if you've set network to auto it will always be searching for the best 3G/2G tower. If the signal transmitted by the 3G/2G tower is weak the phone is lightly to be pulsing the whole time looking for a stronger signal. So I guess it's location specific. If you sitting in an office with a strong 3G signal set network mode to WCDMA only but if the 2G signal is stronger you want to set it to GSM...