So I returned my first S5 within a few days as the Fingerprint Manager would not open, not after reboots, factory reset and 3 hours working with a tech. So, got the second S5, took it home and played with it and then wanted to listen to some music. Plugged in the earbuds and the screen went black, power button would not get the screen back, nor the other physical button, phone wasn't off, the back key light was flashing...tried in vain for 10 minutes , left it alone for 5, nothing....so I took the battery out and inserted back in, phone fine for rest of night, and here we are this morning.....I'll see what happens next, but damn you S5 lol.