Why can't I receive information when my mobile phone is turned off?

There are two main reasons for this: first, the operator's problem, which may be caused by system errors or too much information being processed at the same time!

Second, there may be something wrong with the settings of your mobile phone. I don't know if you have noticed, but there is an expiration date in the current SMS settings. The function of this setting is to tell the system when you send messages in the SMS center (it is recommended to set it to the maximum). If it is set to 24 hours, when you send a message to a friend, your message will be sent to the SMS center first, and then the message will be forwarded to your friend for 24 hours until the other party receives it.

Is this answer clear?