Symbian OS is one of the most secured, configured and open source operating system developed by Psion. It is used in all the leading mobile manufacturers in the world, and is rapidly growing operating system in today’s mobile phones. This operating system works with the latest generation of mobile phones such as 2G, 3G, 2,5 G, etc. The main advantages of this operating system is that it combines the forces of IAE with mobile telephony. The operating system Symbian revolutionary change in mobile telephony and wireless industry and is currently taking all software developers, handset manufacturers and network operators.

Symbian OS supports a wide range of device categories with several user interfaces, including Nokia-S60, UIQ and NTT DoCoMo common software platform for 3G phones FOMA. Common features of all the API for Symbian is working with all these mobile platforms and categories.

Symbian OS is very compact, as the needs of very less memory to fit in a mobile phone, and she also has a full operating system from the standpoint of functionality. Some of the most powerful components of the operating system

• Strong multi-tasking kernel
• Wide range of communication protocols
• Data Management
• Advanced Graphic Support
• Reducing User Interface
• Variety of engines.

Greatness system Symbian:
Some good features of the Symbian operating system are

• Integrated Multimode Mobile:

Symbian OS introduced a revolution in mobile telephony with computing power from a mobile phone. Symbian has provided advanced data services to mobile users in the networks of 2G, 2.5G and 3G generation mobile phones.

• text and multimedia messages:
This operating system supports SMS, EMS, MMS, email and fax. MMS multimedia messages include, fax, e-mail messages are important sources of revenue for 2.5G, 3G networks.

• Application Environment:
This OS allows mobile phones to become a platform for the deployment of a wide range of applications and services developed in different languages (Java and C) and the content formats

• Standards and interoperability:
This operating system was implemented in a flexible, modular architecture, fashion and represents a core set of technologies and the environment. It also supports key industry standards such as IP v4, IP v6, wireless technology, Bluetooth, WAP and Java SyncML.

• Multitasking:

Symbian OS includes a multitasking kernel with support for multi-tasking functions, and is designed with a fully object-oriented and component-oriented technology.

• Reliability:

This operating system supports the integrity of data and receives data from the user quickly.
• User Interface Design Environment: Symbian provides a flexible, feature rich graphical user interface development environment, and also offers a choice for manufacturers, carriers, enterprises and end users. Using the same basic operating system in various designs and facilitates porting of applications for third party developers.

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