Since the update to kitkat, my S4 has been syncing and downloading email messages right around midnight (11:42 last night, 12:04 the night before, etc.) I have a pop3 email account set up (Comcast) and sync is turned on except that I have sync settings set to manual. Before kitkat, it would only retrieve email when I opened the app and actually hit the sync button. What changed in kitkat to cause it to retrieve email late at night? I've checked the settings and searched the forum. Any ideas? I could turn sync off entirely, but would have to turn it on each time I want to manually retrieve my email.