4g is always on when 2g networks is unchecked. battery does drain faster with 3g/4g/lte enabled and when its trying to switch between the signals. i go to university 30 miles away from the city, and there's only 2g and 3g here. without 2g networks enabled, my battery was gone in about 6-7 hours. now with 2g enabled i get about 14-15 hours battery life.
Ya I had a feeling that was it! I wonder if it will be possible to just turn the LTE radio off. For example my provider doesn't offer LTE yet.
P.s. still trying to solve my "roaming situation"
Sent from my LG-P930 using XDA