Messaging service WhatsApp will no longer work on millions of smartphones from 1 February.
Android and iPhone devices which only support outdated operating systems will no longer be able to run the Facebook-owned app.
Smartphones using Android 2.3.7 and older, and iPhone iOS 8 or older, are those affected by the update.
Android and iPhone devices which only support outdated operating systems will no longer be able to run the Facebook-owned app.
Smartphones using Android 2.3.7 and older, and iPhone iOS 8 or older, are those affected by the update.
