[Sincerely] Sales of smart and country letlets have increased rapidly in recent years, especially the country let, due to the increase in affordability and better usability of the new generation. But using a smart phone will not teble .t offers users an unprecedented level of convenience that allows them to access the Internet, applications and many functions and functions everywhere. Smart phones and tablets are also more sophisticated than before, with advanced chip functions such as PCs. With face recognition software and voice-activated virtual assistants. As a result, smart phones will become more and more essential for many businesses as they can integrate and transform all aspects of new customers, provide innovative services with digital marketing approaches, and transform traditional markets. Unable to do so, the high-level chip will help us to be better in the business business, will work to restore the work permit ..