Competition within the mobile industry is definitely intense. As such, smartphone brands have patents over their designs and whoever uses those patents without permission will face legal complaints. For one, the world's No.1 and No.3 smartphone makers, Samsung Electronics Co Ltd with 22.3% market share and Huawei Technologies Co Ltd with a 8.9 % market share, went against each other in a patent showdown. In May 2016, Samsung encountered their first major legal challenge from their Chinese competitor, Huawei. Huawei sued Samsung for infringing 11 of its patents on operating systems, user interface software and 4G cellular-communication technology. Huawei sued its South Korean rival in California and Shenzhen, which are the largest markets of smartphones for Samsung. In the lawsuit, Huawei stated that "Samsung and its affiliates have earned billions of dollars by selling products that use Huawei's technology."