No, because again, adults generally don’t have to clarify this sort of thing in their communications. False advertising laws are predicated on the idea that a reasonable person could misunderstand the advertised claim. It would be a burden on society if all communication was required to be as exact as legal or technical communication. If a person wants the legal or technical details they can read the relevant controlling legal documents, which a company must provide before selling a product that has such documents. And which, in this case, made clear that the plan was not “unlimited”.