In the US, there's no requirement for a company to honor the claims of prior advertisements for things that they might do in the future for a different product. And even if a company does lie about the features of their product, advertising law does not require a company to change the features of their product to meet those claims. What could be required is a change in the advertising, or a refund for people who bought the devices under the false terms.
But if you advertise a certain side of feature features in a phone three years ago, and sell something completely different next year, that's entirely legal.