Name: Your Name (What ever you want)
Email: Your username
Password: Your aol.de account password
Description: aol.de
Click Next Button
Hostname: imap.aol.com
Username: Your username
Password: Your aol.de account password
Hostname: smtp.aol.com
Username: Your username
Password: Your aol.de account password
Click Save Button
Use SSL: None
Authentication: Password
Server Port: 143
Use SSL: None
Authentication: Password
Server Port: 587
You can login aol.de and Signup for aol.de new account on your iPhone from here.