My iphone 6s sent a text message yesterday. I sent it before, and then it suddenly disappeared. Even if it was not delivered at that time, it was later.

The SMS sent by iphone 6s has never been shown as delivered. Generally, there are two situations:

1, the system will use wireless network or mobile network to send, so if the current iPhone is not connected to the wireless network, or the mobile network signal is not good, the problem of information transmission failure will occur.

2. If you are in some signal blind areas, such as elevators, you may encounter the failure to send short messages.

The other party didn't receive the message.

1. For users who have turned on iMessage in iPhone Settings-Information, as long as the other party is also an Apple phone and has turned on iMessage information, they will use the Internet to send messages.

2. As shown in the figure below, the word iMessage is displayed in the current SMS input box, 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. Therefore, if the current iPhone is not connected to the wireless network, or the mobile network signal is not good, the problem of information transmission failure will occur. As shown in the following figure

4. As shown in the figure below, if the current network signal is not good when the message has not been delivered, you can click the red message icon.

5. In addition, if you can't send iMessage information through the network at present, please hold down the content of the short message to be sent, and then select the option of sending it through the short message service, as shown in the figure.

6. For users who have turned on iMessage, it is best to turn it on as a short message sending option in Settings-Information. In this way, when the network is not smooth, or when there is no network, it will be automatically sent by traditional SMS.

In the second case, you can't send short messages.

1, the above is the solution to the problem when using network iMessage to send messages. If you don't open the iMessage message, but you encounter problems when sending traditional short messages, you can refer to the following methods. Of course, we must first confirm whether the current mobile network signal of iPhone is normal. If you are in some signal blind areas, such as elevators, you may encounter the failure of sending short messages.

2. If it is confirmed that there is no problem with the mobile signal of the current mobile phone and the call is normal, then you can try to restart the iPhone at this time. You can turn off your phone by holding down the power button, then sliding, turning it off and turning it on again.

3. If you still can't send SMS after restarting, you can also try to restore the network settings of iPhone at this time. In the Settings-General-Restore list, it can be solved by restoring the network settings.

4. If it still doesn't work after restoring the network settings, it is recommended to call the operator's customer service and ask them to check the data in the background of the mobile phone to see if there is any problem.