To import your email contacts, go to Email and then select Contacts.
In the top right you'll see an option to 'import contacts' - select this.
You then have the option to either update an existing contact or insert your import as a new contact.
To import new contacts make sure you have this option selected and then upload your contacts from your computer. You will need to upload your contacts as a .CSV file.
Select the file you require and then click on 'Import'.