Why can't I get a short message notice of missing words in other provinces?

"Missed call reminder" service is a short message reminder service provided by China Telecom for Tianyi mobile phone users who have not opened personal communication assistant service. When the user is turned off, out of service area, missed the phone or the phone is busy, missed the incoming call, the system automatically sends a short message to remind the user of the incoming call information. Applicable to China Telecom Tianyi mobile phone users who have not opened personal communication assistants (personal communication assistants have included the function of reminding missing messages). Users who have opened the function of reminding missing messages can receive reminder messages when roaming outside. There is no charge for the user number to receive the SMS reminder of missed calls, and the callback is charged according to the basic call fee standard. It can be handled through SMS business hall, handheld business hall, online business hall, 10000 and business hall. When the missed call reminds the user that there is a missed call because he can't answer the phone normally, the system will automatically give a voice prompt to the caller, which can be divided into three types according to the status of the missed call (that is, unable to connect, busy and power off). For more service offers, click on "official website" Customer Service 2 18 below to answer your questions.