How can you tell in advance if a TV needs to be connected to the internet to work? We just plug computers/iPhones to ours via HDMI, and we never connect the TV

How can you tell in advance if a TV needs to be connected to the internet to work? We just plug computers/iPhones to ours via HDMI, and we never connect the TV directly to the internet. The last thing we'd want is to get a TV home, get it unwrapped and plugged in, and then have to take it back because it won't turn on without an internet connection. And I wouldn't trust a Best Buy salesperson to be knowledgeable/honest about this. I realize there are some signage brands that never require this, but often there are great deals on Samsung/Vizio/etc. units at Best Buy/Costco, and I'd rather get one of those if I can use it in offline mode.