Why can't a telecom mobile phone number send recorded information to the other mobile phone?

Network problems. When sending recorded short messages with the mobile phone number of telecom, it needs the support of information network. If it can't be sent out, it's because of network problems. Just change the location to a place with superior signal. Established on April 27th, 1995, China Telecom is a state-owned super-large communication backbone enterprise and a global partner of Shanghai World Expo. It has been selected as one of the "Top 500 Enterprises in the World" for many years, mainly engaged in comprehensive information services such as fixed telephone, mobile communication, satellite communication, Internet access and application.