(Currently on 2nd s5) Have noticed a few occasions where neither home nor power button will wake. Only soft keys light up. If you touch blank screen you still hear touch sounds. But results in having to pull battery. S5 is NOT rooted, and only a very small handful of apps installed(Facebook, xda, dropbox, Amazon). Thought was a bad hardware issue, thus why I replaced phone. Only to see issue still remains. Any suggestions? I've factory reset multiple times on both phones. Did however carryover sd card from s3. Would wrong that possibly fix?