There are many reasons why this website may not work.
Your iPhone has been Jailbroken - This may not be an issue normally but third party software may interfere with the method used to set to Data Settings.
My Settings are wrong - With over 1000+ Carriers listed I may have a number of settings wrong. If you have installed and data is not working, go to your Carriers website and look up the settings (or email me). Please then forward these settings to firstname.lastname@example.org so I can update the settings on my website.
MMS is not working - Apple does not give any way of automating MMS Settings.
Tethering is not working - Apple does not give any way of automating tethering settings.
Will this work on Android and other Phones? The automation at the moment will only work on iPhones, but in the future this capability may be added.