95720, why does the call always fail?

It means that the calling number itself has expired or is invalid and cannot be used.

Generally, the numbers beginning with 95 and 96 are mostly advertisements, frauds and harassing calls. 95 short number refers to the call center service special number. In addition to the short number starting with 95, there are also short numbers starting with 96. The difference between these two service cornets is that cornets starting with 95 are used to develop the call center industry in many provinces or nationwide.

Telecom operators give warm tips, advertisements, sales promotion and harassing calls, and advise users to refuse to answer. In addition, users can block these numbers through the anti-harassment function of the operator. Mobile users send "KTFSR" to version 10086 to open high-frequency anti-harassment service. Telecom users send "KTFSR" to open high-frequency anti-harassment service. Unicom users send short message "KT" to apply for opening anti-harassment service.