I couldn't find this particular model, Samsung Discover, in the phones forum list. If it is indeed there I apologize and ask this thread to be moved. My wife and I bought this phone for my father-in-law as an emergency phone. However, even when the phone is powered off the battery drains over the course of hours. We had taken the phone back to where we bought it. The salesman went through the phone and eventually replaced the battery with a new one. When the phone is on the battery drains normally. I had installed the GSAM battery app. The screen is using over 63% of the battery. Anyone have any clues/suggestions as to what the problem could be? I had read that "fast boot" might be the cause, but can't find where to shut it off.