The Unified Inbox displays all your emails in one place, as opposed to separate New Mail and Old Mail folders. When iOS 14 is released this fall, iPhone users will be able to change their default mail and browser apps from Apple's Mail and Safari apps.If your iphone is broke or is malfunctioning then visit this iphone repair On the next field that appears enter the email address of your iPhone mail account.Since iPhone and iPad users more often than not use the phone's default email application, addressing mail settings within iOS itself is much more straightforward than trying to troubleshoot any.Scroll to bottom and tap on “Fetch New Data“ 3. Iphone mail default to all inboxes Important at the top and everything else at the bottom.