I have canceled the SMS receipt service of China Telecom, but why do they still send me receipts?

Because when the system canceled the enhanced SMS caller receipt service, the data could not be synchronized to the SMS center, so we are handling the feedback. SMS receipt refers to a service in which customers immediately receive a receipt SMS after sending a text message using a China Telecom mobile phone. The content of the receipt includes status information and additional information indicating whether the recipient has successfully received it. The length of the additional information is limited to 44 characters (including punctuation marks), and the content involves culture and entertainment, life and health, practical knowledge, hot events and other fields. To learn more about service discounts, click the "official website" below and customer service 219 will answer your questions.