This article explains how to sync your iPhone and iPad using the iCloud service. Instructions apply to iPhones and iPads ...

You’ll need to use unique Apple IDs for each device to completely stop your iPhone and iPad (or another iPhone) from syncing.

For more detail, see How to sync iMessage conversations on iPhone, iPad and Mac. Karen has worked on both sides of the Apple divide, clocking up a number of years at Apple's PR agency prior to ...