A source on twitter getting the inside news for HTC, made an announcement of Jelly Bean 4.2 for HTC One. HTC One is the leading phone in the smartphone market today, but it somewhat lacks as it still operates on Jelly Bean 4.1.2 while the version 4.2 has been out from a couple of months now. Also the users had been craving up for the update from some time now. So may be the company has decided to finally come up with a update. See the screenshot of the tweet from the company.
However according to the leak the update would be out in two to three weeks time. This group is really efficient in their work, when it comes to leaks. They correctly predicted the HTC First, and other phones too. So one can expect this news to be authentic already.
Source: @LlabTooFeR