What does in call service means on iPhone?

Hello Grass2023,

Thanks for asking the Apple Support Communities in call service.

Without more context, we can't provide an answer. Also, your profile shows you are running iOS 17 beta. If you have issues, please use the Feedback app shown below, as beta iOS is not supported.

Here is info about the program: Apple Beta Software Program

Here are answers to the frequently asked questions Apple Beta Software Program - Apple Beta Software Program

If you want to remove the Beta software, you can use the options in this article, erase your device, and restore your backup you made before installing beta: How to uninstall iOS or iPadOS beta software - Apple Support

Reach back out if you revert to a full release version and the issue remains, or provide more info about your question, and we're happy to help.

Thanks.