Motorola has been pitching its Atrix smartphone to consumers in the U.K. as “the World’s most powerful smartphone,” but apparently not everyone agrees, as a complaint contesting that status was upheld by the U.K.’s Advertising Standards Authority (ASA).

A pair of complaints took issue with Motorola’s claims about the Atrix, the company’s Android-based smartphone that can connect with a unique “Lapdock,” which enables the phone to power a full-size laptop.

The complaints took issue with the fact that the Atrix runs on a 1 GHz processor, while Samsung’s Galaxy S II smartphone runs on a slightly faster 1.2 GHz processor.

Motorola contended that while the Atrix runs on a smaller processor than does the Galaxy S II, the combined whole of its features, including its Lapdock accessory, makes it the most powerful smartphone in all the land.

The ASA didn’t agree and upheld the complaints in its assessment, meaning Motorola will have to come up with another tag line to pitch the Atrix in the U.K.