All you do is open the browser on the phone (assuming it is on the wireless network you Ignition server is on) and type in the Ignition url:http://ipaddress:8088
Of course replace ipaddress with either the IP or hostname of the Ignition server. There are a couple of important settings for sizing on smaller devices. So open the Ignition Designer and select Project > Properties from the file menu.
First click on Client > User Interface. Make sure the client minimum size is smaller than your device or you will get scrollbars.
Secondly, click on Mobile > General on the left. Make sure it is set to "Fit to Device" or is the size of your phone. You can also set it to auto-login.
Hope this helps.