A TOS presented after an electronic device has been sold is not valid in most of the World since it's considered an attempt to, after the sale, force a change of the terms of the implicit contract which is the sale.

A company can shove whatever they want in front of the customer as contract conditions they have to accept for a sale before the sale - by which point the potential customer can refuse and not buy or accept and buy - not after.

Of course, they don't do that because they would lose most sales, so instead there's a TOS or EULA which the owners of the devices are forced to agree to after the sale to fully enjoy that which they bought, but these are really just legal fictions in most countries.

Mind you, this does not apply to a subscription to an ongoing service, though even then at least in Europe, there are conditions they much obbey to have the customer accept a TOS or a TOS change after subscribing, such as it being possible for the customer to cancel the service at no cost rather than accept the new TOS.

Unconscionable bunk. It's illegal anyway, just like how you can't sign a contract to sell yourself into slavery.

If the courts won't enforce it, vigilantes should.