Nokia n95 stopped updating now dead
Research in June 2011 indicated that over 39% of mobile developers using Symbian at the time of publication were planning to abandon the platform.On 22 June 2011, Nokia made an agreement with Accenture for an outsourcing program.Symbian OS became prominent from the S60 (formerly Series 60) platform built by Nokia, first released in 2002 and powering most Nokia smartphones.Symbian eventually became the most widely used smart mobile operating system.
Symbian OS was (from 2001) essentially a shell system and required an additional user interface (as middleware) to form a complete operating system.
The platform was designated as the successor to Symbian OS, following the official launch of the Symbian Foundation in April 2009.
The Symbian platform was officially made available as open source code in February 2010.
All of this discouraged third-party developers, and served to cause the native app ecosystem for Symbian not to evolve to a scale later reached by Apple's App Store or Android's Google Play.
By contrast, i Phone OS (renamed i OS in 2010) and Android had comparatively simpler design, provided easier and much more centralized infrastructure to create and obtain third-party apps, offered certain developer tools and programming languages with a manageable level of complexity, and having capabilities such as multitasking and graphics in order to meet future consumer demands.
Symbian was intended to be developed by a community led by the Symbian Foundation, which was first announced in June 2008 and which officially launched in April 2009.