Do short messages sent by mobile phones always have short message receipts?

When SMS receipt is enabled, you will receive multiple SMS receipts when sending SMS in groups. In this case, it is suggested to set the receipt condition before sending short messages in groups, and only set the receipt for unsuccessful short messages, so that unsuccessful short messages will only provide the receipt to remind you to resend. 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. For more service benefits, click on "official website" customer service 222 below to answer your questions.