Do you? Manufacturers can easily require an Internet connection to make the device work. They can also include their own radios and modems. All in the name of being user friendly!

Are there really TVs that won't work until connected?

Thanks.

Not that I know of, I always skip the smart TV bullshit. Another commenter pointed out that a Philips model pester you with a pop-up to connect it every two weeks or so but that seems like the most manufacturers are attempting at this stage.

TVs can refuse to get the EPG over the air and insist on getting it from the internet. I'm not aware of one where this happens, though.