HTC has confirmed on its official Facebook page that Android 4.4 KitKat update for the original HTC Butterfly is in the works and will be released soon.
This is the only information HTC has given as an answer to a Facebook question. We know more though thanks to a previously leaked roadmap.
Earlier today we got a nice table spilling the beans on HTC update plans for lots of smartphones. There HTC Butterfly is listed for Android 4.4 + Sense 5.5 firmware update. This means the Butterfly, unlike Butterfly S, won't be getting the latest Sense UI 6.0. If you want to know more about the latest HTC launcher, you should check our HTC One (M8) review.
Thank you, Ronan, for the tip!