As promised, HTC has just started with the rollout of Android 4.3 and HTC Sense 5.5 for the international/European version of the HTC One. Therefore, the HTC One will be again on par with last week's launched HTC One max, which already launched with Google's latest available Android version and HTC's much improved Sense UI. Beside all the Android 4.3 goodies and enhancements, the major improvements are in Sense 5.5 which means the upgrade will bring Video Highlights improvements like an upgraded and easier to use interface and the possibility to add your own soundtracks to Video Highlights. Other improvements come to BlinkFeed which got a complete overhaul for ease of use and it's finally allowing to add RSS feeds as sources.
There's many more what HTC Sense 5.5 will bring so this is not just another firmware upgrade to improve stability and fixing bugs but it contains the yet best HTC Sense UI - if you like Sense. To learn more about Sense 5.5, don't forget to read our HTC One max review here.
As always, this is a staged upgrade starting in Scandinavia, which means it's not hitting all Ones at the same time; but it can take a while until your One will receive it. Nevertheless, it might be worth to check manually if the 675 MB upgrade is already available.
UPDATE: As we've just learned, the upgrade starts in Scandinavia (today) with other countries to follow within the next few weeks. So don't be nervous if you don't get it within the next couple of days. As always, the upgrade availability is pretty much carrier and country dependent.
UPDATE 2: It's confirmed that the HTC One upgrade is pretty much a 1:1 copy of the HTC One max, except that the One Sense camera isn't featuring dual-shot which HTC just introduced with the One max. It's yet not clear why HTC left this feature for it's hero device but OIS (Optical Image Stabilization) could be a reason since the One has it but not the One max.
Cheers ~ Arne