The most likely reason why your Contact Poster is disabled is because you have disabled Name & Photo Sharing. This setting controls whether your name and photo are shared with other people when you call them.
To check this setting, go to the Phone app and tap Edit in the top-left corner. Then, tap on your name card. Under Contact Photo & Poster, make sure that the toggle for Name & Photo Sharing is enabled.
If the toggle is already enabled, then the problem may be something else. Here are a few other things you can try:
- Restart your iPhone.
- Reset your network settings. To do this, go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings.
- Make sure that your iPhone is up to date with the latest version of iOS. To check for updates, go to Settings > General > Software Update.
- If you're still having problems, contact Apple Support for help.
Note: Even if you enable Name & Photo Sharing, the other person will still need to have iOS 17 installed in order to see your Contact Poster.