How sync contacts from iPhone to iPad?

Hi there,

to do so make sure that you do this on both of your devices:

Go into settings -> iCloud -> make sure contacts is enabled

(If a pop-up comes up, click merge)

You should start to see your contacts on both devices synced.

1. Are both devices yours?
2. Are you using the same Apple ID for both of them?

If the answer is yes for both, all you need to do is to use iCloud Contacts.

Settings > [your name] > iCloud > Contacts : ON

It will then auto sync all contacts to all devices using the same Apple ID.