Joke Collection Website - Public benefit messages - The other party's mobile phone was turned off, and many short messages were sent, only two of which showed delivery. What happened?

The other party's mobile phone was turned off, and many short messages were sent, only two of which showed delivery. What happened?

Upon inquiry, Zhongguancun showed online.

1, the other party's mobile phone is not in the service area or the signal is weak, so even if the text message has been sent, the other party's mobile phone can't receive it.

2. The receiving time set by the other party's mobile phone is 1 day. If the other party's mobile phone is turned off or out of service area, and there is no signal during this period, you can't receive SMS.