IPhone6 mobile phone, Unicom card can't send text messages, what should I do?

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, so if the current iPhone is not connected to the wireless network or the mobile network signal is not good, the information transmission will fail. As shown in the figure below.

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

5. In addition, if you can't send iMessage information through the network at present, please press and hold the content of the short message to be sent, and then select the [Send SMS] option, as shown in the figure.

6. For users who have turned on iMessage, it is best to turn on the [Send by SMS] 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.