Just received (yesterday) new Samsung Galaxy s4 under warranty Early today (Sunday) the phone shut off and would not turn back on. I've tried every solution that I could find already, multiple times: - Switched batteries with my other fully-working s4, still won't turn on unless plugged in. Confirms it is not the battery's problem. - Factory reset and wipe using KIES. - Pulling Battery, leaving it out, putting it back - Made sure power button wasn't stuck - Using a Samsung charger and cord