New photos of Microsoft's next mid-range phone, codenamed Superman, reveal a bright green Lumia 720 successor is being developed, along with new firmware.

Two new Lumia phones, thought to be the 'Lumia 730' and 'Lumia 830' are reported by the Verge as arriving in the next few months. Recent images leaked of the Lumia 830, which is thought to have the codename 'Tesla.' Now, the first photos of what is understood to be the Lumia 730, codenamed 'Superman' have been obtained by Windows Phone Central.

The Lumia 730 looks to be the successor to the Lumia 720, one of the more popular mid-range phones by Nokia announced in early 2013. The Lumia 730 is aimed at the growing 'selfie' market as it allegedly features a 5 MP front-facing camera and a 4.7-inch display. Additionally, the Lumia 730 looks to carry on the bright green color scheme found with the Lumia 63x, Lumia 930 and Lumia 1520 series and features on-screen keys.

Not much else is known about the phone at this time, although we are attempting to gather more information on specifications.

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.

Any features of Debian Red, including improvements or optimizations are currently unknown, although we are working to find out more.

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