Chinese equipment and handset vendor Huawei is seeking CNY80 million ($12 million) in compensation from South Korea’s Samsung for alleged patent violations related to its 4G and terminal display technology.

The Shenzhen-based company in May filed lawsuits in the US and China against Samsung. Huawei, the third largest smartphone maker in the world, said it filed lawsuits in the District Court for the Northern District of California and Shenzhen Intermediate People’s Court for Samsung’s alleged infringement of its intellectual property.

The dispute involves the unlicensed use of its 4G technology and software in 16 Samsung smartphone models, including the Galaxy S7, Galaxy S7 Edge and Galaxy J5, which were assembled at factories in China.

The Chinese vendor has extended the case to Samsung’s Chinese subsidiary, Samsung (China) Investment, which it claims is liable for the violation, the South China Morning Post reported.

A number of news outlets reported the development as a second patent-infringement case against Samsung in China, but a Huawei representative told Mobile World Live: “There is no new case. This was part of the original court filing in May.”

Huawei also has filed a patent lawsuit against mobile operator T-Mobile in the US District Court for the Eastern District of Texas. According to court documents, Huawei took action because T-Mobile refused its offer for fair, reasonable and non-discriminatory terms (FRAND) for its essential patents for 4G.