Below given step is the complete guide for you on how to add ntlworld email settings iPhone :
• Go to the iPhone’s settings menu.
• Scroll down and choose Mail, Contacts, and Calendars from the drop-down menu.
• Choose Add Account from the drop-down menu underneath the iCloud tag, then select Other (only if your ntlworld.com email provider isn’t listed here).
Select Add Mail Account and fill the asked information.
• Name
• Email
• Password
• Click the Next Button to continue.
Select IMAP as the incoming mail server and fill in the following information.
• imap.ntlworld.com is the hostname.
• Username
• Password