Last week I believe. Just in time for me to crack my phone this week
I like it a lot so far, but they moved some things around so it takes a bit of getting used to coming from the S4. Running 4.4 with the newer processors, it is definitely noticeable how fast it is even compared to the S4. It also is the first phone I've owned in a while that uses a different charger so only the charger that came with it fits so I can't use the other ~10 chargers I have. I looked at the main competition for it too, the HTC One M8 and I wasn't too impressed with it other than the all metal case.