In addition, @LlabTooFer mentioned in another tweet that it is the end of the line for the overseas HTC One X, which is 18 months old. The international version of the phone runs Android 4.2.2 and already offers support for BlinkFeed and Sense 5. One reason that the HTC One X will not get any more updates is the complexity involved in updating this version of the phone, which is powered by the Tegra 3 processor.
Android 4.4.2 will not be coming to the HTC One with Sense 6 (which can also be called the sixth Sense). This new version of HTC's Android skin will not be offered to HTC phones currently on the market, until next Fall. The combination of Android 4.4.2 and Sense 6 could be what is installed out of the box on the sequel to the HTC One, rumored to be called the HTC One+ or the HTC One 2.
Meanwhile, the U.S. version of the HTC One is supposed to receive Android 4.4.2 this month, in an OTA updated bundled with Sense 5.5.
Tweet reveals January through February time frame for Android 4.4.2 update on the international HTC One, HTC One Dual SIM, HTC One mini and HTC One max
source: @LlabTooFer, Softpedia via TechRadar