Name: Your Name (What ever you want)
Email: Your username
Password: Your 163.com account password
Description:
Click Next Button
Hostname: appleimap.163.com
Username: Your username
Password: Your 163.com account password
Hostname: applesmtp.163.com
Username: Your username
Password: Your 163.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 163.com and Signup for 163.com new account on your iPhone from here.