Much like HTC, Samsung hasn't expended a huge amount of effort on Windows Phone 8, having crafted just a few handsets running the platform before seemingly losing interest. Various clues are now pointing to a renewed curiosity in Microsoft's mobile OS from the company, in the form of the high-end SM-W750V. Shipping documents from before the new year indicate a screen size of 5 inches and provide first mention of the model number, which matches a recent North American approval by the Bluetooth SIG. A user agent profile on Samsung's site is even more fruitful: "Windows Mobile Lab" is named co-conspirator alongside Sammy, Internet Explorer is penned as the default browser, and a couple of specs point to an LTE-capable handset with a screen resolution of 1,920 x 1,080. As these things go, it's probably just a matter of time before pictures of the handset start surfacing, and there is a large mobile conference a little more than a month away. With Nokia rumored to soon enter unfamiliar territory, perhaps Samsung is preparing a undercover agent of its own.