Why can't Apple send a text message, prompting an unknown error?

1, no signal or poor signal, you can go to a place with strong signal to test.

2. The mobile phone number turns off the SMS sending function. You can turn on SMS and try again.

3. The number balance is insufficient. You can check the balance or recharge and try again.

4. The number of SMS center is set incorrectly. Please reset the correct number of the SMS center.

5. There is something wrong with the mobile phone, so you can change the test.

Extended data:

1, SMS repeated reminder

The SMS reminder system of iPhone repeats the reminder 1 time by default, that is, the system will remind you again after receiving the SMS without reading it. You can go to Settings-Notification Center-Information Repeat Reminder-and choose never to remind you or remind you more times.

2. Quickly check the sending time of each message.

Viewing the sending time of each message in iOS7 requires gesture operation, which can be seen by swiping left in the messaging interface.

3. Display the number of messages.

You should know that the maximum number of words per SMS is 70, and if it exceeds 70, it will be sent in two. If you want to display the number of SMS words, go to Settings-Information-Number of Words and turn on the switch.