About Beijing Unicom Hang-up SMS

"On-hook SMS" refers to a product in which a mobile phone user dials Unicom's fixed telephone number, and after the call is over, he will receive a preset SMS from the enterprise, and the SMS sending number is the fixed telephone number of the enterprise. The content of the short message can be enterprise introduction, product introduction, promotion activities, holiday blessing information, etc. , and can be modified at any time. On-hook SMS is mainly an accurate advertising service, and its significance to enterprises lies in advertising business, not SMS business.