Ahead of its launch, Samsung's Galaxy S 4 earned itself media coverage from New York Times, which reported the phone to feature technology that can scroll through UI elements by tracking your eye movements. When the phone did launch, Samsung was careful enough not to mention "eye" in its launch presentation, or the product's documentation, stating that the phone tracks the user's "face."

It turns out LG holds patents to certain UI enhancements that involve eye-tracking, dating all the way back to 2005, and the company is reportedly on a fact-finding mission, whether the Galaxy S 4 infringes any of them. As its very first line of defence, Samsung denied any infringement of LG patents. Currently, the Galaxy S 4 is not generally available in stores, and it could be late-April before the premium handset makes it to over 155 countries.