CardDAV Setup for iOS
Do the following on your iOS device:
Tap Settings.
Select Mail, Contacts, Calendars.
Tap Add Account.
Select Other.
Under Contacts tap Add CardDAV Account.
For Server enter mail.hostedemail.com.
For User Name enter your email address.
For Password enter your email password.
Enter whatever you like in the Description field. It will be autopopulated with what was entered in the Server field.
Tap Next.
Your webmail contacts will now appear in the contacts app along with any groups. Any changes made in webmail will show up on your device with a refresh.