Reports are coming in that AT&T has started pushing out an OTA update for the HTC One X today. The update, build number 2.20 that bumps Android to 4.0.4, has only gone out to a few users and it is unclear when it may roll out to the rest. Neither AT&T nor HTC have issued a change log that details what is included in the update. Users are reporting that it includes security fixes that block some root exploits, a setting to remove the menu button “bar” for some apps, and the ability to long press the multi-tasking button for a pop-up menu.
Users who have rooted their One X or who are thinking about doing so may not want to jump on this update just yet. The fixes for the root exploits have the consequence of also closing methods used to gain root access. Since AT&T and HTC do not offer bootloader unlocking on this version of the One X, the update will effectively block root access until the hackers figure out a new way to do so.
If you get the update, please post and let us know of any other changes that are included.
source: Android Central