I get a similar problem. My phone recognises there is an update, but it keeps coming back with download unsuccessful. My phone is s-on, unrooted, running Android 4.3. Apart from this recent update it is exactly the same as when it came out the box.
Any ideas how I can sort this, or do it another way?
Thanks in advance
Sent from my HTC One using XDA Free mobile app
Sent from my HTC One