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Apple iOS 14.2 upgrade affecting Call Forwarding feature on the Horizon iOS mobile application

January 26, 2021
Chloe Willoughby

UPDATE - 11:20am 26/01/2021

The networks 3rd line team have advised that upgrade work has been performed on the Horizon servers between 25th January 20:00 – 26th January 02:30 to support the release of the new version of the Horizon iOS Soft Client. The client itself should be available for download via the app store, please look on the app store from 27th January for the new version, download and re-test.

Should you have any further issues please call our Support Department on 0800 043 0800 option 3 or via email

15:40pm 07/12/2021

The latest version of Apple’s iOS software, version 14.2, has changed the way applications manage telephone calls and introduced some unexpected call behaviour to the Horizon iOS client, namely for attended (or “warm”) call transfers and conference calls.

The original caller is cut off when using attended transfer and the same behaviour has been noted when creating a conference call via the iOS client. This behaviour is not present in earlier versions of iOS and the blind transfer feature is unaffected.

The network is actively working with the vendors on getting a fix in place for iOS client users that are running iOS 14.2. As soon as the network have a fix we will issue further communications and an update via the App Store will be available.

As soon as we have further information we will update the service page.