Make sure you've purchased the J Admin Mobile App from the App Store.
Open JAM! on your iPhone.
A test site will appear in the Sites list.  This will allow you to test that your app is working.
To add a new site, press the + sign in the top right corner.  You will need the following info:

• Host: enter your website address
• Path: enter the path to your xmlrpc index.php. By default, Joomla! uses /xmlrpc/index.php.
• Username: enter the username of an account that is allows to use the JAM plugin. You can configure the access level required by editing the plugin settings. By default, a user must be a Super Administrator.
• Password: enter that password for the account.

That's it!  Have fun!

If you have any issue or questions, contact us on our support forum.