Microsoft just released the final security update to its Surface Duo 2 dual-screen smartphone, which comes right before support for the device officially ends October 21, reports Windows Central. The original Surface Duo was launched in September 2020 as an ambitious attempt by Microsoft to unite smartphone and tablet into one with an innovative foldable design. With its dual-screen technology and custom Android operating system, the Surface Duo was marketed as the ultimate productivity-on-the-go device. Its successor, the Surface Duo 2, was released in October 2021 to negative reception due t…