Moving a important contact to Favorites in your IOS app
To do this on your iOS app, follow the instructions below:
Select Favorites as shown below and click on add + sign.
Select Heart icon to add contact into favorites list.
Moving a Messages to Starred Folder
To move message into starred folder select more action shown below and select star.
You can also swipe towards left and select more action and select star from menu.
Rearrange your folders in the order that you like. Go to your sidebar by pressing the more action icon.
Once the sidebar is opened,press Edit as shown above and drag and drop the folder in the position you want to move it. and press Done.