Send a short message from Apple 1 1, but it doesn't show that it has been delivered. Does it mean that the other party didn't receive it?

It may be the following situations: 1. If the other party opens the network, it can receive it through the connected wireless network. If the other party doesn't open the network, your imessage will automatically send text messages; 2. Maybe you are blocked by the other party; 3. If the other party is not in the service area or turned off, it will be received when it is turned on; The other party has received it. If the delivery fails, the other party has a mobile phone number, which will be automatically converted into a short message. Without these tips, the delivery was successful. :? IPhone cannot send and receive text messages. Analysis of specific problems: 1. Make sure the signal is normal and turn off the flight mode. 2. Check whether the SIM card status is normal. 3. Check whether the send key is displayed in bright color and clickable. 4. If you can't click Send after entering the text, the "Send" button is still gray. Please turn off "Show Subject Bar" in SMS settings. 5. If you send text messages to multiple people and manually enter numbers, please make sure to use line breaks instead of spaces to separate each number.