Samsung Ultra Edition is a former series ofmobile phones fromSamsung Electronics that were designed to be extremely slim and minimalistic. The first range was introduced in June 2006[1] which included theX820, dubbed the "world's thinnest" at just 6.9 millimetres thickness.[2] The second range came in February 2007[3] including the new "world's thinnest" U100 model at 5.9 mm thickness,[4] a figure that remains very rare in handsets as of 2020. To date, the slimmest mobile phones areOppo R5 andR5s introduced 2014 with 4.9 mm thickness. The "Ultra Edition" names represent the respective handset's width in millimetres. It was discontinued in January 2010, as some of its features were integrated into theSamsung Galaxy family with the launch of theSamsung Galaxy S series.
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