Guide on how to fix iMessage or FaceTime not working on iPhone, iPad and iPod Touch in iOS 12, 11 and iOS 10 https://www.unlockboot.com/imessage-not-working-iphone/
We have tested 5 ways to fix iMessage or FaceTime not working on iPhone and iPad in IOS 10, 11 or iOS 12.
1. Check your Internet Connection.
2. Check Date and Time
3. Disable and Enable again iMessage
4. Sign out and Sign again to your Apple ID
5. Install the latest iOS software update
If you are trying to activate iMessage and your device stuck on the Waiting for Activation screen, then you can follow our guide here to fix this issue easily https://www.unlockboot.com/fix-imessage-waiting-for-activation-error/
You can also check our dedicated video guide to fix iMessage waiting for activation issue https://youtu.be/c3h3hTRC7RM
If you are trying to activate FaceTime on your iPhone, iPad or iPod Touch and it’s stuck on FaceTime Waiting for activation screen, then you can follow this guide here to resolve this issue https://www.unlockboot.com/fix-facetime-waiting-activation/
If you want to use FaceTime on Mac, then you can read this guide to configure it easily on your Mac https://www.unlockboot.com/facetime-not-working-mac/