Which enterprise SMS platform is better?

Enterprise short message platform: provides a telecom operation platform for enterprises to push short messages to target users immediately. China Mobile, China Unicom and China Telecom, including Beijing Mobile, Jiangsu Mobile, Beijing Telecom, Shanghai Telecom, Beijing Unicom and Guangdong Unicom, have more than 100 access points, with an average daily processing capacity of 200 million short messages and interface response processing speed.