The LG Optimus 4X HD is a slate, multi-touch smartphone running the Android operating system. Designed and manufactured by LG Electronics. The Optimus 4X HD was the world's first smartphone announced with a quad-core processor along with the HTC One X and the Samsung Galaxy S3 and the fourth phone in the LG Optimus-Android series. LG first introduced the LG Optimus 4X HD at Mobile World Congress. The Optimus 4X HD was launched with Android 4.0 Ice Cream Sandwich. Since April 2013, some variants have had a Jellybean update available.