Symbian OS is an open operating system, for mobile devices, with associated libraries, user interface and reference implementations of common tools, produced by Symbian Ltd. It is a descendant of Psion's EPOC and runs exclusively on ARM processors.
Symbian Ltd. formed as a partnership between Ericsson, Nokia, Motorola and Psion, to exploit the convergence. PDAs mobile phones. Symbian was previously owned by Nokia (56.3%), Ericsson (15.6%),Sony Ericsson (13.1%), Panasonic (10.5%) and Samsung. Later, Nokia announced that they intended to acquire all shares that they did not already own. The acquisition was of €264 million, or $410 million.
On 24 June 2008 Symbian Foundation announced with the aim to "provide royalty-free software and accelerate innovation".
Symbian OS has different versions, namely:
Symbian OS v6.0 & 6.1
Nokia 3600, 3620, 3650, 3660, 7650
Nokia N-Gage, N-Gage QD
Sendo X
Siemens SX1 fall under this category.
Symbian OS 7.0 &7.0s
Nokia 6260, 6600, 6620, 6670, 3230, 7310,7610, 7710, 9300, 9500,
Sony Ericsson P800, P900, P910,
Panasonic X700, X800,
Samsung D720, and
Motorola A925, A1000 to name a few.
Symbian OS 7.0s was a version of 7.0 special adapted to have greater backwards compatibility with Symbian OS 6.x, partly for compatibility between the Communicator 9500 and its predecessor the Communicator 9210.
Symbian OS 8.0
Nokia 6630, 6680, 6681, 6682
Lenovo P930
Symbian OS 8.1
Basically a cleaned-up version of 8.0, this was available in 8.1a and 8.1b versions, with EKA1 and EKA2 kernels respectively. OS 8.1a was backward compatible.
Nokia N70, N72, N90 have OS 8.1.
Symbian OS 9.1/9.2
Released early 2005. It includes many new security related features, particularly a controversial platform security module facilitating mandatory code signing. Symbian argues that applications and content, and therefore a developers investment, are better protected than ever, however others contend that the requirement that every application be signed (and thus approved) violates the rights of the end-user, the owner of the phone, and limits the amount of free software available.
The earlier versions had a fatal defect where the phone hangs temporarily after the owner sent hundreds of SMS'es. However, on 13 September 2006, Nokia released a small program to fix this defect.
Nokia 5700,Nokia 6290, Nokia 6120 Classic, N71, N73, N80, N91, N92, N93, N95, E50, E51, E60, E61, E90
Sony Ericsson M600, P990.
Symbian OS 9.3
Released on 12 July 2006, Upgrades include improved memory management and native support for Wifi 802.11, HSPDA, Vietnamese language support. The NOKIA N96 as well as the NOKIA N78 feature Symbian OS 9.3.
Symbian OS 9.5
Announced in March 2007. Provides the concept of demand paging which is available from v9.3 onwards. Applications should launch up to 75% faster. Native support for mobile digital television DVB-H and ISDB-T formats and also location services. Additionally, SQL is provided by SQLite. Not currently on any device in the user market. broadcasts inSphere: Related Content
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