Name: Your Name (What ever you want)
Email: Your email address is your username
Password: Your cable.com account password
Description: iCable
Click Next Button
Hostname: mail.I-cable.com
Username: Your email address is your username
Password: Your cable.com account password
Hostname: smtp.I-cable.com
Username: Your username
Password: Your cable.com account password
Click Save Button
Use SSL: None
Authentication: Password
Server Port: 110
Use SSL: None
Authentication: Password
Server Port: 25
You can login cable.com and Signup for cable.com new account on your iPhone from here.