Hi all,
I have connected my MG4 to my WiFi and, using a sniffer, I was able to check why, even if the car is out of data, I was still able to connect via the Internet. In theory, this should not work on the car itself. I found out that the car always checks into a local server—in my case, in Australia. When you use the MG iSmart app, you connect to the same server, which then connects back to your car. I think MG has some kind of VPN that allows them to connect to their server with or without data on the SIM card. It’s the same concept with all IoT devices, where you connect to them via the Internet, not via Bluetooth or your internal network. I hope that makes sense to everyone.
If you want to watch some of my reviews about the MG4, check out my videos.