BlackBerry is working on a new smartphone that has a 4.5-inch screen with a 1440 by 1440 pixel resolution, as evidenced by the latest version of the company's SDK. "I know, I know...you want more details on that new device, but we're not quite ready to give them yet, so hold tight and watch the blog for more information!," wrote Tim Neil, director of application platform and tools product management at BlackBerry, in a blog post on Wednesday.

Neil says that the new phone has 453 dots per inch, which equals 4.5 inches.

According to specifications leaked to BlackBerry news CrackBerry, the new BlackBerry 10-based smartphone in question is code named "Windermere." It has a steel frame, a 13-megapixel camera with optical image stabilization and 3450 mAh battery.