HTC has started pushing out a new update to the U11 units in the United States. Arriving as software version 2.42.617.1 and weighing in at around 737MB, the update brings along Android security patch for the month of December. In addition to the security patch, the change-log reveals some system enhancements are also there. This is the first update the handset has received after it got Oreo, something which started happening late November in the US. Thanks for tip, Joey Pinili!!!
Source: https://www.gsmarena.com/htc_u11_getting_new_update_in_us-news-29079.php