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Demonstration model: Iphone 12 System version: ios 14

This short message failed to be sent. Mainly due to the following reasons:

1, when the phone bill is insufficient, you can keep the function of answering the phone for one day, but from the moment you turn it off, you can no longer send text messages.

2. If you are blacklisted by the other party, the SMS will not be sent. Only by letting the other party delete you from the blacklist can you successfully send short messages.

3. The other party has set flight mode or turned off: If the other party's mobile phone is in flight mode or turned off, if you send a message to the other party, the message will not be delivered. If the other party turns on the phone, your Apple phone will immediately inform you that your message has been received by the other party.

4. Bad cell phone signal: The usage status of our cell phone is related to the cell phone signal. The stronger the cell phone signal (Apple's five-cell phone signal is the strongest), the smoother the cell phone will be used, especially when making calls, texting or surfing the Internet. If it's a cell phone signal problem, you can send a text message somewhere else, or wait a while and then send a text message when the signal is good.