What does it mean that Apple's short message has a red exclamation point?

A red exclamation mark will appear on the sent email, indicating that the email was not sent.

If the mobile phone can't send short messages, you can try to restart or replace the mobile phone for testing to check whether the following conditions exist:

1. SMS center number is not set correctly. Please re-enter the correct SMS center number.

2. No signal or low battery. It is recommended to recharge and try again.

3. The system is busy due to the peak of sending short messages on holidays, so it is suggested to try again later or avoid sending during peak hours.

4. The sending format is incorrect. If you send a short message to PHS users, you need to add the area code before the number.

5. The short message sending time exceeds 24 hours;

6. The mobile phone shields the short message sending function;

7. Blacklisted by SMS;

8. The number balance is insufficient. Try again after charging.

9.SMS inbox and outbox are full. Please delete some messages and try again.

If the above reasons cannot be solved, you can contact the local manual customer service or go to the business hall to confirm whether the SMS function is enabled and hand it over to the staff.

Extended data:

Zazie Hoko

Shortcomings of SMS

Small information capacity

Short message platform is relatively boring because it can only edit text and lacks corresponding picture materials, and short message advertisements are rampant, so the reading rate is not necessarily too high. The sending cost of MMS is too high.

Terminal data is difficult to collect.

SMS platform needs corresponding numbers to send, and how to collect these numbers and how to send them to those customers after collection has become a very important issue, so the customer coverage of SMS platform is not necessarily comprehensive.

Transmission limitation

Generally, the number of SMS platforms is limited, thousands or even tens of thousands. It is basically impossible to send messages after 8 pm, and its flexibility and management are not as good as that of SMS power grid.