Why did Apple's mobile phone fail to send text messages?

1. In the iPhone setting information, users who open iMessage will use the network to send information as long as the other party is also an Apple mobile phone and has opened iMessage information;

2. The SMS input box displays the words iMessage, indicating that the information is currently sent by the network;

3. When sending iMessage message, the system will use wireless network or mobile network to send it. If the iPhone is not connected to the wireless network, or the mobile network signal is not good, the information will not be sent.

4. When the message has not been delivered, if the network signal is not good, click the red message icon;

5. If you can't send iMessage information through the network at present, press and hold the content of the short message to be sent, and then select the option of sending by short message service;

6. For users who have turned on iMessage, in the settings and information, turn it on as a short message sending option. When the network is not smooth or there is no network, they will automatically send it by traditional SMS.