The use of public networks allows PoC radios to achieve long-distance communications without additional networks or the use of repeaters. Therefore, PoC radios can be used in various scenarios, and save the customer additional investment. As a result, 3G/4G-based PoC radios are becoming increasingly popular around the world. For customers from certain business sectors where the reliability and security of voice communications can be compromised, PoC is an ideal solution for them as it focuses on voice communication and has multimedia application functions, delivery and positioning as a useful complement. Undoubtedly, there is a huge market potential for these products.