If your call history is showing up on another iPhone, it may be due to shared Apple ID or iCloud settings. Here are 9 ways to stop call history from being visible on another device:

1. Sign Out of Shared Apple ID: If you share an Apple ID with someone, your calls might appear in their call history. Sign out of Apple ID on one device to keep histories separate.

2. Disable iCloud Drive: iCloud Drive can sync call logs across devices using the same Apple ID. Turn it off in “Settings” -> “Apple ID” -> “iCloud” -> “iCloud Drive.”

3. Turn Off Handoff Feature: This feature allows calls started on one device to be picked up on another. Disable it in “Settings” -> “General” -> “Handoff.”

4. Create Separate User Profiles: Make sure each iPhone has a unique Apple ID profile for personal use.

5. Use Call Forwarding Wisely: If you’ve set up call forwarding from one iPhone to another, disable it unless necessary.

6. Unlink Devices: If you’ve linked more than one device via Family Sharing or through your carrier, consider delinking them if call privacy is a concern.

7. Manage Shared Passwords: Change passwords regularly and ensure they aren’t shared with others who might have access to a different iPhone.

8. Reset Network Settings: Sometimes, glitches can cause syncing issues that reveal call histories on multiple devices. Reset network settings by going to “Settings” -> “General” -> “Reset” -> “Reset Network Settings.”

9. Contact Carrier for Assistance: Some carriers have services that sync call logs across devices in real-time. They can help you opt-out or manage these services effectively.

Implementing these steps will help keep your call history private and ensure it doesn’t show up on another iPhone inadvertently.