iMessage and FaceTime are not working
It’s not working
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It’s not working
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Messages Troubleshooting. https://support.apple.com/en-us/HT204065
Do you have access to another WiFi network where you can try? That has worked for several people.
Try a restart.
Restart your iPhone, iPad, or iPod touch https://support.apple.com/en-us/HT201559
Try a forced restart.
Reset Device. https://support.apple.com/en-us/HT201412
If necessary
Hard reset. https://www.wikihow.com/Hard-Reset-an-iPhone
Do a backup and try a factory reset. Then restore from your backup.
Restore to Factory setting. https://support.apple.com/en-us/HT201252
Backup - Restore your device from an iCloud or iTunes backup. https://support.apple.com/en-us/HT204184
Did you already try the general troubleshooting for this issue?
If you get an error when trying to activate iMessage or FaceTime – Apple Support
iMessage and FaceTime are not working