Last night while using my S5 mysteriously went to a black screen than the animated Samsung followed by the AT&T logo and sitting at that for quite sometime before loading back up. I had read earlier about a bug fix update for some S5's with the software version XXU1ANCE and upon going into about phone I have build number KOT49H.G900AUCU1ANCE. But I am not sure if this is what it already was anyone care to look at their build number to see if they show anything different?