After the launch of the square-shaped Blackberry Passport, the Canadian company has said that it already has another unusual device under development. Blackberry will look to introduce at least one unconventional device each year. Ron Louks, head of the company’s devices division, has also hinted that Blackberry is working on a version of the Passport that is easier to operate with one hand. The original Passport, meanwhile, has been experiencing a strong launch – it is unavailable on Blackberry’s own website, and sold out on Amazon within six hours to become the website’s most popular unlocked smartphone.