If you are an owner of the Tegra 3 version of the HTC One X, and you like to tinker, then you might be excited to learn that there is already a port of Google's newest Android OS version 4.1/Jelly Bean for the device! Some devs over at XDA used the Galaxy Nexus port of Jelly Bean and were able to get a partially functional port of the new OS going for the HTC One X. Here is a brief list of known issues:
  • Cellular
  • WiFi
  • Audio
  • Camera

Obviously, those are some pretty big issues that need to be addressed, yet it's still amazing how fast these guys got to work. The new OS was only released two days ago! Supposedly, even though there are some pretty important functions that are... non-functional, the One X Jelly Bean port seems to be running smooth with no reboots, or laggyness. It may still be a work in progress, but could be fun to tinker around with. We will give you a source link below where you can download the necessary stuff, but make sure you follow their directions perfectly, and create a backup. We are not responsible if you brick your phone.

Interestingly, HTC already issued a response when questioned about how quickly they plan to have an official OTA update to Jelly Bean for the HTC One X,

We are excited about Android Jelly Bean and are planning to support it across a variety of our devices. We are reviewing the software to determine our upgrade plans and schedule, so please stay tuned for more updates on specific device upgrade plans.
That seems like the typical canned response. Still, if third party devs can get things moving this fast, then there's no reason why HTC's paid developers cannot get Jelly Bean going by the end of the year for the device, especially since Jelly Bean is not that much different than ICS.

Source: HTCOneForum via XDA