I know there is a previous thread discussing this issue but as a new member I am not allowed to post on it. I have managed to unfreeze my infotainment system by disconnecting the negative terminal on the battery for 5 mins then reconnecting. On starting the engine the 'Loading settings' screen appears for 10 secs or so and then everything starts working again. It even reconnected to my phone. Be warned though, you get loads of warnings on the dash saying park assist, stability control etc are not working. They all cleared as soon as I started driving though. Hope the same works for you guys too.