I find some changes in my Contacts on the iMac are automatically updated in my iPad and iPhone Contacts. However the list of contacts on the iPhone is not the same as on the iMac. Where is the Sync setting for this?
Edit - Things are now in sync after switching on the three devices but I don't know how this happens. Is it done via iCloud?
If you look in iCloud settings on the devices, you can turn on (or off) the syncing of Contacts (and other apps) there. Obviously a device has to be turned on and connected to the internet for the sync to take place.
Roy Rainford 