GCT Semiconductor Holding, Inc. (NYSE:GCTS) stock is trading lower on Tuesday after the company signed a Memorandum of Understanding with Samsung to accelerate the development of 4G and 5G chipsets and modules. What To Know: The companies will work together to promote the Samsung and GCT solution and to strengthen the ecosystem of OEM and ODM device makers in order to support wireless operators worldwide, including the Saudi Arabian oil group Aramco. Using its 5G chip, GCT is focused on advancing the 5G ecosystem of OEM and ODM device makers for a variety of devices, including mobile routers, …