What is your home ISP? I've tested it on cable as well as FiOS, both worked fine for me. Their website is pretty straightforward when it comes to configuring the port forwarding on the router, and adding a VPN connection on your iPhone, and the app itself makes it dead simple to set up. Know the public IP address of your home connection by Googling 'what is my ip.' .
Know the private IP address of your home Mac. Log into your home router. Set up port forwarding:. UDP port 1701 to your Mac's IP address. UDP port 4500 to your Mac's IP address. UDP port 500 to your Mac's IP address.
Set up the iVPN software on your Mac:. Create some credentials to log in with. Choose L2TP as the VPN type. Enable strong encryption.
Add the VPN connection on your iPhone:. Use your public IP address as the server's IP address. Use the credentials you created when you set up the iVPN software. Choose L2TP as the VPN type, and enable 'Send All Traffic.' .