Try this:
Incoming Mail Server
Host Name: imap.comcast.net
User Name: the first part of your email address before the "at"
Password: you should know that
Outgoing Mail Server:
SMTP: smtp.comcast.net. Tap on this to get to those settings>on this page it should be the Primary Server, tap on smtp.comcast.net again.
The Host Name is the same, smtp.comcast.net
User Name: same as the incoming
Password: same as incoming
Use SSL: turn this switch on
Authentication: Password
Server Port 587
Go back to the first page with the Incoming Mail Server
Tap on Advanced:
Mailbox Behaviors
Move Discarded Messages Into
Deleted Messages
Set all of these to your desired setting
Use SSL: turn on
Authentication: Password
IMAP Patch Prefix /
Server Port 993
You would be setting up the account manually. Usually it should verify automatically if you put in your email address and password.