What's the 400 phone? What's the difference between it and ordinary mobile phones?

Answer: 400 telephone is a kind of value-added service telephone and an upgraded version of fixed telephone. Its characteristics are that the number is simpler, easier to remember, easier to record, with certain cross-regional flexibility, easy to popularize and special number segment. Compared with ordinary fixed telephone numbers, 400 telephone has more powerful functions, can intelligently transfer services such as voice mail, and has stronger applicability, which brings a lot of convenience to enterprises and customers.