If you have an issue with Messages or FaceTime after setting up your new iPhone
iMessage and FaceTime might not complete activation on iPhone 14 and iPhone 14 Pro. Update to the latest version of iOS to address the issue.
After setting up your iPhone, you might experience one or more of the following issues:
You can't receive iMessages or FaceTime calls.
You see a green message bubble instead of a blue one when you send a message to another Apple device.
Your existing message threads haven't appeared.
Conversations in Messages show up as two separate threads, instead of one.
Recipients see your messages coming from the wrong account, for example from your email address if you had selected your phone number.
Update your iPhone 14 or iPhone 14 Pro model
To resolve this, update to the latest version of iOS.
If you're still having an issue with Messages or FaceTime
In the Settings app, tap Cellular. Make sure that your phone line is turned on. If you use multiple SIMs, make sure that the phone number you want to use is selected and turned on.
In the Settings app, tap Messages. Then tap Send & Receive.
Tap the phone number that you want to use with Messages.
Go back in the Settings app, and tap FaceTime.
Tap the phone number that you want to use with FaceTime.