LG Electronics on Friday announced today it sold an Optimus L Series device every second over the past two months, propelling sales of the smartphones to over 15 million units.

Optimus L smartphones - the L3, L5, L7 and L9 models - were launched at Mobile World Congress (MWC) last year. LG will unveil a new generation of the stylish series at MWC 2013 with an upgraded design and improved features.

The new Optimus L SeriesII will carry on the legacy of its predecessor. The Optimus L3II, Optimus L5II and Optimus L7II all feature a comfortable contour with laser-etched details in a slim design. The sleek and customizable devices are also differentiated by smart LED lighting around the home button.

The new Optimus L SeriesII smartphones will be unveiled at Mobile World Congress later this month.

The South Korean company was the world's fifth-largest handset maker in 2012, with a market share of 3.3 percent, according to market researcher Gartner Inc.