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A 3D phone is a mobile phone or other mobile device that conveys depth perception to the viewer by employing stereoscopy or any other form of 3D depth techniques. Most 3D phones have an autostereoscopic parallax barrier display (glasses-free 3D display) and some also have a 3D camera and a 3D output via HDMI. Since 2002, many companies have introduced autostereoscopic displays for smartphones. By the end of 2002, Sharp launched the Sharp mova SH251iS, the world's first commercial 3D-enabled phone, on NTT DoCoMo's network. Sharp's device made a huge local success in Japan, with 4.325 million units shipped, which made it the best-selling 3D-enabled device for many years later. Nevertheless, it was not until 2010 when 3D-enabled mobile phones began to catch on. According to DisplaySearch, smartphones will be the largest 3D display application on a unit shipment basis in 2018, with 101 million units with 3D capability.
A4Tech Co., Ltd. is a Taiwanese computer hardware and electronics company headquartered in New Taipei, Taiwan. A4Tech Co., Ltd. was founded in 1987. Its products include computer peripherals such as keyboards, mice, PC cameras, hubs, headsets, speakers and gaming devices.
Redmi is a China-based smartphone and a sub-brand owned by the Chinese electronics company Xiaomi. It was introduced as a budget smartphone line manufactured by Xiaomi, that was first announced in July 2013. It became a sub-brand, separated from Xiaomi, on 10 January 2019. Redmi phones use the Xiaomi MIUI user interface on top of Android. Models can be divided into regular Redmi phones with screens usually up to 5" and Redmi Note series with displays exceeding 5". The only other line is the Redmi Pro series, first introduced in 2016 with a dual camera system, USB-C and an OLED display. The Redmi A series has been marketed in several Asian and European countries. The most significant difference from other Xiaomi smartphones is that they use less-expensive components and thus are more cost-effective. In August 2014, The Wall Street Journal reported that in the second quarter of the 2014 fiscal year, Xiaomi had a market share of 14% of smartphone shipment rankings in China. Redmi sales were attributed as a contributing factor toward this gain in shipment rankings.