How to open the SMS receipt function?

You can send "KTDXHZ" to 1000 1 to order the short message receipt service, or you can call the telecom customer service number.

SMS receipt refers to the business that customers receive the receipt message immediately after sending the message with China Telecom's mobile phone. The contents of the receipt include the status information and additional information of whether the receiver successfully received it. The length of additional information is limited to 44 characters (including punctuation marks), and the content involves cultural entertainment, life health, practical knowledge, hot events and other fields. Suitable for China Telecom Tianyi mobile phone users.