I have the HTC One M8 and since I often drop to 3G and 4G is pretty weak here anyway (Phoenix,AZ), I decided to keep it on 3G only since I hear 3G eats up less battery. I have had a few different devices since LTE was introduced here and regardless, 4G was weak or very inconsistent regardless of what the coverage map tells me. So far after a couple of days it seems to be paying off but was not sure if using 3G would use more or less data. I never exceed my cap or even come close, but am just curious if there was a difference in consumption. Thanks!