In what comes as a surprising news, popular Chinese smartphone manufacturer Xiaomi has been sued by Coolpad for infringing on their patents. Coolpad has demanded to halt the production for all those Xiaomi products that are developed using Coolpad’s patents.

According to a report form ITHome, Xiaomi has developed products and sold them in the market illegally infringing on Coolpad’s various patents. The patent infringement relates to app icon management, notifications and system UI on Xiaomi products that Coolpad had originally developed. The company has also demanded Xiaomi to pay for all the losses that Coolpad has faced because of this infringement. The case hasn’t been heard yet but Coolpad says that they are actively looking to recover losses from the patent infringements that Xiaomi did; they have also demanded to compensate for the legal fees and all other related financial loses.

Clearly, the patent infringement relates to Xiaomi’s MIUI OS that is used on a majority of their smartphones and tablets. MIUI is based on Google’s latest version of Android and a new version of their proprietary OS is rolled out every year. The company had not long ago unveiled MIUI 9 based on Android 7.1 Nougat with improvements in performance and slight UI overhaul.