Favorite contacts will always stay on the top of
the contact list, so you can quickly find them.
To add a contact to your favorites, please set it
as below:
Please tap his profile picture
> Tap his profile picture again
> Enter his profile page
> Tap the setting button on top right corner
> Add to favorites.
By the way, if you want to remove contacts from
favorites, just enter the same page and click the
button "Remove from favorites" .