I-Phone 13 Pro. First ring goes to message. Ring again and it is okay. How to fix this issue.

That sounds like you have Do Not Disturb enabled with the Repeat Call feature turned on. Try turning off DND by opening the Control Center and tapping on the Focus button if it is highlighted.

Hey there Alberto_1,

That's a strange issue to occur, and we'd like to help however we can. Let's start with ruling out some possible causes, along with confirming more details to better understand what's happening:

1. Does this only occur with a specific contact who tries calling you, or anyone who tries calling you?
2. When did this first start to occur on your iPhone?
3. Sometimes unexpected behavior can be resolved with a restart: Restart your iPhone
4. Since you have a compatible iPhone model, the latest version is iOS 16.2. You can verify this within Settings > General > About. In case you needed it, this link shows how to first back up, then Update your iPhone or iPad.

Cheers!

Hi Alberto_1,

Thanks for the further details. We'd next suggest contacting your carrier to see if the issue is on their end. If not, then contact Apple Support for a deeper dive.

Have a fantastic day!