Why doesn't Apple imessage work, and it always prompts that it is activated incorrectly?

Should be a problem with the settings, you can do this:

IMessage is an instant messaging software launched by Apple, which can send short messages, videos and so on. It has high security. Different from the SMS/MMS service of operators, users only need the data support of WiFi or cellular data network to complete communication.

1. To activate imessage, you need to send a short message for verification. Our mobile phone can't send text messages, of course it can't be activated. Enter *#5005*7672# in the dialing interface, and then press the dial key, as shown.

2. You can see the query result of the number of the pop-up SMS center. My initial number is 0, which means that there is no SMS center number set, as shown in the figure.

3. Next, we enter *5005*7672* SMS center number #. You can use Baidu's various regions and operators, and there will be a list. I'm from Hunan Unicom, and the number is+8613010731500. Then press the dial key to make a call, as shown in the figure.

4. You can see that the number of the SMS center has been set successfully, but it has not yet taken effect, and the address has not been displayed, as shown in the figure.

5, we will restart the phone, as shown in the figure.

6. After restarting imessage, you can see that it has been activated, as shown in the figure.

7. SMS can be sent successfully, but it cannot be sent before, as shown in the figure.