Nokia is preparing as many as 12 Windows Phone devices, according to reports.

Russian site mobile-review has detailed Nokia’s strategy for Windows Phone devices. The site, renowned for its accurate Nokia information, claims that the company is working on four Windows Phone 7.5 launch devices with as many as 12 to follow throughout 2012. The claims are bold but the site does offer up information on the initial four devices that Nokia hopes to be released by the end of 2011 or early 2012.

Microsoft is expected to unveil a full chassis 2 hardware specification for Windows Phone 7.5 (Mango). Nokia has allegedly been working closely with Microsoft on the new chassis specification to ensure they are able to create cheaper Windows Phone devices for the mass market. Nokia’s Windows Phone devices are currently labelled with “W” (for Windows). The first handset is expected to be a variant of Nokia’s X7 device. The prototype is equipped with a WVGA display, Qualcomm QSD8250 chipset and 8MP camera. Mobile-review believes this is Nokia’s first Windows Phone device, set to launch in late 2011 or early 2012.

Nokia’s other three Windows Phone launch phones include:

• A dual-core N8 variant with a 12MP camera
• QWERTY touchscreen candy bar phone
• Cheaper touchscreen device with less expensive body materials

Mobile-review expects Nokia to release as many as 12 Windows Phones during 2012. The site says the remaining 8 devices are still under consideration.