iPhone "Calls on other devices" feature not working with iOS 15

I have identified a bug on iOS 15. The "calls on other devices" feature does not work anymore. When I put my SIM in my main (iPhone 12), the following iPhones receive the call

Works:

iPhone 6 iOS 12.5.8

iPhone XR iOS 18.7.10

Does not receive at all:

iPhone 6s iOS 15.8.8

iPhone 7 iOS 15.8.5

I have reported the issue via the feedback form, but it would be helpful to know if others also have this issue. If you do, please report this problem as well

Posted on Oct 14, 2026 6:42 PM

1 reply

SravanKrA

Level 10 (454,138 points)

Oct 15, 2026 3:02 AM in response to 0wsn

0wsn wrote:

I have identified a bug on iOS 15.

On my iPhone 13, 13 Pro and 12 Pro I did not have any issue on any of these iOSs: - iOS 16, iOS 17, iOS 18, iOS 26, and iOS 27.

Since your device is still running iOS 15, it is significantly behind the current iOS version, iOS 27. In terms of major releases, your device is five iOS generations behind, having missed iOS 16, iOS 17, iOS 18, iOS 26, and iOS 27.

Each major iOS release introduces changes that may include new features, improvements to existing functionality, security enhancements, bug fixes, and changes to how certain apps and services work. However, not every feature is available on every iPhone model, and some updates may be limited by hardware compatibility.

To understand what has changed over the years, I recommend reviewing Apple's official release notes for each iOS version:

About iOS 27 Updates, About iOS 26 Updates, About iOS 18 Updates, About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...