To be able to register your devices on the MiNET network, you will need to add your MAC addresses to your account. If you don't know how to find them, feel free to follow the tutorial “Adding new devices on your MiNET account” which will indicate how to proceed.
By following this tutorial, you will see how to configure your iPhone to enjoy a WiFi Internet connection with MiNET.
Go to the phone's WiFi settings, and :