LG has officially confirmed that it is planning to release a Jelly Bean update for the Optimus 4X HD and Optimus L7. It also said that it will push Android 4.1.2 only to the devices that are unlocked. This is probably due to carriers wanting to approve the update for the phones they sell under contract.
The changes in the update are focused on making Google Now available as well as optimizing the user interface of Project Butter. Additional improvements include faster NFC (Near Field Communication) transmission rates for Android Beam 2.0, support for WPS and expandable notifications.
The update will roll out nearer to the end of March, with users being able to use LG's mobile Support-Tool to update their device. For those who have the gift of understanding the German language can check out the source here.