AT&T here I can go two days, maybe do a clean reset from new and make sure you're not double syncing, there. is a lot of useless syncing on this phone. Disable the Samsung cloud and Google cloud and go into Google and all your social media apps and see what's on for permissions (like location). I'm using Facebook lite and messenger lite and, disabled all the bs permissions they ask for in settings and that changed the phone for me quite a bit. You really have to tweak things on this phone from stock to get it just right. Disable the games and AT&T bloatware in settings is another tip I could give you. You could also download package disabler and completely turn off apps you don't want running. In battery settings you could also go add sleeping apps that you don't want notifications on and turn them off so they only work when you open them. I don't like a lot of notifications so I turn a lot of apps off and the phone is nice and quiet and I get what's important.