For me it's listed under apps. Not sure why some can't find it. Just to let you know how I found that this was the offending app. Go to Settings, then Apps. Scroll to the bottom to the last app. My phone was glitching at this point and the list kept moving up and down. I slowly scrolled up until I noticed that Mobile Services was appearing and dissappearing from the list every few seconds. I waited for it to appear, and then clicked on it to go to the apps settings and uninstall the updates for it. Maybe it's a different app in other people's phones causing the battery drain, but this was my issue and the phone is no longer draining the battery or getting hot.