When you try to connect your WF-1000XM4 headphones to any device using the Sony | Headphones Connect app, the app version should be Version 8.0.0 or later. If it is not, update the Sony | Headphones Connect app to the latest version and try the setup again.
If the issue is still not resolved, follow these steps:
- Restart the mobile device.
- Place the headphones into the charging case, close the lid, and after a few seconds remove them again.
- Reset the headphones.
- Initialize the headphones. You can see how to reset or initialize the headphones in the Help Guide or by following the instructions in this How to reset or initialize the headset article.