How do I activate my iMessage?

Check your device settingsMake sure that you're connected to a cellular data or Wi-Fi network. If you're using an iPhone, you'll need SMS messaging to activate your phone number with iMessage and FaceTime. ... Go to Settings > General > Date & Time and make sure that you've set up your time zone correctly. read more

If you get an error when trying to activate iMessage or FaceTime To use iMessage or FaceTime, you need to activate them on your iPhone, iPad, or iPod touch. If you see an error message during activation, follow these steps. read more

The device will verify your login information and then activate iMessages if successful. If you don’t have an Apple ID, see this guide for detailed instructions on creating one. iMessages may take up to 24 hours to activate because Apple needs to verify that the phone number and Apple ID match. Activation usually happens within an hour. read more

The issue might be due to a number of things like poor Internet connection and hence you might have to try out more than one solution to fix this issue on your iPhone and iPad. read more