Unable to activate IMessage.

1. Make sure your iMessage account is activated. Open the Settings application, enter the Info tab, and then turn on the iMessage switch. If you have not activated iMessage before, you will be prompted to enter your AppleID and password. Make sure that your device has set the date and time correctly.

2. If the problem can't be solved after restarting, you can try to turn off the wireless network and activate the iMessage information service directly using the mobile phone network. If activation through wireless network or mobile network is unsuccessful, you can also try to restore the network settings of iPhone at this time.

3. There may be many reasons for the unsuccessful activation of 3.iMessage. The following are some main reasons: network problems iMessage communicates through the Internet. When the network is unstable and the signal is weak, iMessage activation will fail.

4. Enter the interface of Apple's mobile phone and click the Settings icon. In the setting interface, select the information option. Turn on the switch behind the imessage information option. Pop up a small window and select a good option. The interface prompt is waiting for activation, just wait patiently.

5. This may be a network anomaly: Please make sure that you are connected to the cellular data or Wi-Fi network, and the network remains normal. If the network is abnormal, it is recommended to restart the wireless router or mobile phone. Maybe the time zone is set incorrectly: the wrong time zone setting will lead to abnormal activation of imessage.

6. The first step is to confirm whether your AppleID is correctly set with iMessage and FaceTime. Whether the e-mail settings are correct and whether the phone number is in the list. IMessage, click Settings, Information, iMessage, and then check whether the AppleID is your email and the phone number is valid.