Name: Your Name (What ever you want)
Email: Your email address is your username
Password: Your 139.com account password
Description:
Click Next Button
Hostname: imap.139.com
Username: Your email address is your username
Password: Your 139.com account password
Hostname: smtp.139.com
Username: Your email address is your username
Password: Your 139.com account password
Click Save Button
Use SSL: Yes
Authentication: Password
Server Port: 993
Use SSL: Yes
Authentication: Password
Server Port: 465
You can login 139.com and Signup for 139.com new account on your iPhone from here.