The rush to have 4G for its own sake has cost Android phone designers in the actual happiness their devices, JD Power found in its first phone satisfaction study of 2012. Those who had LTE devices, almost all of them Android, gave noticeably lower scores to battery life, at 6.1 out of 10 on average versus 6.7 for those on 3G. The added speed ended up itself compounding the problem, since they used their devices more often and cut the battery life short that much sooner.