Microsoft is reportedly planning to launch a selfie phone of its own soon, and the handset will most likely debut as the Nokia Lumia 730.

The whole selfie trend is gaining momentum and it seems that more smartphone manufacturers are ready to take advantage of it, releasing handsets with powerful front shooters. Microsoft is the latest company rumored to join the selfie party with an upcoming smartphone codenamed "Superman," expected to arrive as the Nokia Lumia 730.

No concrete evidence is currently available regarding this smartphone and its exact specifications, but a new leak gives us a look at the Nokia Lumia 730's purported design.

The newly-leaked images come from WPCentral, which notes that the smartphone is currently in development under the "Superman" codename. The Nokia Lumia 730 is expected to launch as the successor to the popular Lumia 720 handset, sporting notable improvements such as a larger display and improved cameras.

The design shown in these images looks fairly familiar, but it appears that a portion of the rear panel, where the camera is located, is slightly bulged. This indicates that the purported Nokia Lumia 730 may come with a large rear camera sensor, possibly boasting Nokia's much-touted PureView technology.

The leaked images further reveal intriguing bits about the smartphone's operating system, suggesting that the Nokia Lumia 730 is running on the Lumia Debian Red update.

While Google names its OS versions after tasty treats, Nokia names its own updates after colors, and they all come in alphabetical order. Nokia is currently rolling out the Lumia Cyan update, and the next one could be the Lumia Debian Red for Windows Phone 8.1.

"There is also evidently new firmware being developed for this phone that likely coincides with Windows Phone 8.1 Update 1 or even Update 2, which is thought to arrive in November. The name of this firmware is 'Debian Red,' which is the actual name of a color, though more often associated with the Linux Distro. However, 'Debian Red' is very likely the internal codename, similar to how Lumia Black was originally called 'Bittersweet Shimmer' and Lumia Cyan was 'Cherry Blossom Pink.' The firmware names go in alphabetical order, starting with A for Amber, Black, Cyan, and now D for Debian Red," WPCentral further points out.

Based on previous rumors, the Nokia Lumia 730 is expected to sport a larger display of about 5 inches, likely with an HD resolution. Other rumored specs include an 8-megapixel rear camera with Carl Zeiss optics, as well as a 5-megapixel front shooter to allow for high-quality selfies. Under the hood, the device could pack a quad-core Qualcomm Snapdragon 400 processor, which would place it in the mid-range segment of the smartphone market. On the software side, Windows Phone 8.1 should run the show out of the box, with this Debian Red firmware on board.

Nothing is officially confirmed at this point, but the Nokia Lumia 730 is expected to make its debut by the end of the month. The handset could then hit retail availability sometime in mid-September. The Verge also reported recently that Microsoft had new Nokia handsets in the pipeline, including one codenamed "Superman" and another codenamed "Tesla." That report, however, said that the Tesla handset would launch as the Lumia 830 and would replace the Lumia 720.

With nothing official so far, however, take everything with a grain of salt for now. We'll keep you up to date as soon as more information becomes available, so stay tuned.