A different twist for me...
I'm experiencing a similar issue, but with a twist...
After what looked like a successful DL of the OTA 4.3 OS Update on my AT&T HTC One, the actual update never kicked off.
Now when I touch "Check for updates" on the "AT&T software update" screen, it doesn't do anything. You can see the button move, but you get no response, No dialog, Nothing....
Is there a way I can kick off the DL'ed update file or clear out the [possibly corupted?] download and reset the state of that process and trigger it to start again?
The DL happened Thurs Oct 10th 9AM.. I had a similar type hiccup the last Maintenance Update that AT&T / HTC sent out, and waiting 24 hrs cured that... But, as of now, more than 24 hrs later, No Joy!!
Anyone out there have a fix??