iPhone - Contact Synchronization

Swipe on the left side in the Connect 3.0 mobile app and tap Settings.

Under Contacts, tap contact synchronization and set it to "All contacts"

Important, then tap "Show me how to do it" after which a guide will appear.

On the last page of the guide, tap "Install Profile".

The profile is then installed on the phone as shown in the guide.

To activate the profile, open Settings on your iPhone -> Downloaded Profile and tap Install in the upper right corner.