Hi,
It is possible to test features like Wifi, Settings, etc. We do not restrict that for our users in any way.
When it comes to Appium Studio, you would need to have your own iOS device connected to your machine in order to test these functionalities. And if you wish to test your own iOS device, you would need to meet couple of requirements.
If you wish to do it from Appium Studio for Eclipse, then you would have to first connect to the cloud (cloud.seetest.io), here is how to get started with Appium Studio for Eclipse.
As our preferred choice of devices, we like to work with Physical Devices, so the iOS devices you see on the cloud should be Physical Devices and not Simulators.
Something to keep in mind is that, since the cloud is used for public usage, there may be some restrictions, so you may not be able to access Settings and such on our public devices.