The LG Optimus series is a series of smartphones and tablet computers manufactured by LG Electronics. Optimus-branded devices have been produced running both the Android and Windows Phone 7 operating systems. Android LG Optimus, alternatively titled LG Optimus GT540, LG Loop, or LG Swift LG Optimus Q, alternatively titled LG LU2300 LG Optimus Pad, a tablet released in May 2011 LG Optimus Pad LTE, an LTE-capable successor tablet released in January 2012 in South Korea LG Optimus 2X, the first dual-core smartphone in the series, released in February 2011 LG Optimus 4X HD, a quad-core successor launched in October 2012 LG Optimus 3D, released in July 2011 LG Optimus 3D Max, successor announced in Mobile World Congress 2012 LG Optimus M LG Optimus Me LG Optimus Zip, released by Verizon Wireless on September 22, 2011 LG Optimus Slider, released by Virgin Mobile USA on October 17, 2011. LG Optimus LTE (alternatively LG Optimus True HD LTE), released in December 2011 LG Optimus LTE 2 was announced in May 2012, to feature 2 GB of RAM LG Optimus Vu, announced in February and released in March 2012 LG Optimus G, LG's 2012 flagship phone, released in November 2012 LG Optimus G Pro, a larger variation on the Optimus G, featuring a 1080p display; released in March 2013 in Japan and South Korea and May 2013 in the United States Optimus One The LG Optimus One, released in October 2010, is LG's second phone in the Optimus series. Due to network differences between carriers, LG created a sub-series with carrier-specific variants based on the Optimus One. Over two million of the Optimus One and its carrier variants combined have been sold. Additionally, some hardware variants add minor new features: LG Optimus Black, released in May 2011 LG Optimus Chat, featuring a smaller screen and a slide-out QWERTY keyboard LG Optimus Chic, with different hardware design plus improved digital camera and modem LG Optimus Net, with an improved 800 MHz single-core processor LG Optimus Sol, with an improved 1 GHz single-core processor Optimus L LG Optimus L is an Android sub-series launched in 2012. It consists of the following: First Series LG Optimus L2, released in July 2012 LG Optimus L3, released in February 2012 LG Optimus L5, released in June 2012 LG Optimus L7, released in July 2012 LG Optimus L9(P769), released in October 2012 LG Optimus L9(MS769), released in July 2013