Vertu is at it again, producing a mobile device for the elite few that can afford it. This time, however, it is doing things a bit differently. For one, it has again partnered with Bentley to design a phone that matches one of the latter's automobile lines. Second, unlike most of its phones, this isn't so smart. The Signature for Bentley, though classy and luxurious in its design and materials, is pretty much a basic mobile phone, with a focus on voice calls and audio in terms of functionality.