VAIO has already announced a smartphone powered by Windows 10 Mobile in early February, but it seems that the company is working on another device with Microsoft's operating system. New VAIO smartphone with Windows 10 Mobile has passed Bluetooth certification.

The product code for Phone Biz, which is the company's first smartphone running Windows 10 Mobile, is VPB0511S, but this model has a different code, VPU051C11N. It features software version number 10.0.10586, which is the RTM build. At the moment, there is no mention of possible specifications, but we'll keep you posted.