Nokia E51 is a Symbian OS mobile phone by Nokia announced on 18 September 2007 as the replacement of the Nokia E50 in the business-focused Eseries line. It was the second Nokia UMTS / HSDPA dual band device. The phone was available with a black, silver or bronze-coloured border and backplate. It has a slim body made of stainless steel (12 mm thick, 100 g weight), and was the smallest Nokia smartphone of the time, yet is still technologically capable like other S60 devices of the time. A version without the integrated camera also existed. The E51 was highly acclaimed and was succeeded by the Nokia E52.

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