Synchronization enable - so go ahead
First you should check whether you have released the contacts in your iCloud settings to sync. For this, proceed as follows:
- Open the "settings".
- Tap on "iCloud".
- Here is the Slider for "contacts should be pushed" to the right.
- In addition, tap the "settings," "Mail, contacts, calendars".
- There, also click on "iCloud" and move the Slider for "contacts" to the right.

Synchronization enable
If the second approach does not help, you should check whether your iPhone is a Wi-Fi connection. To be able to access your iCloud data access, you need access to the Internet.
