You know the drill – if you do not do plenty of data access from online sources on your smartphone, then turning off its 3G or LTE radio would go a long way in preserving battery life. Needless to say, those running on 3G will use up less juice than on a LTE network, and if you drop the connection to just EDGE, it will offer even more mileage. AT&T has stepped forward to the plate, claiming that their LTE handsets will be easy on the battery when their LTE service rolls out. 


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