International Mobile Station Equipment Identity(IMEI)

is a number, usually unique, to identify 3GPP (i.e., GSM, UMTS and LTE) and iDEN mobile phones, as well as some satellite phones. It is usually found printed inside the battery compartment of the phone, but can also be displayed on-screen on most phones by entering *#06# on the dialpad, or alongside other system information in the settings menu on smartphone operating systems.
IMEI (International Mobile Equipment Identity) is a 15- or 17-digit code that uniquely identifies mobile phone sets. The IMEI code can enable a GSM (Global System for Mobile communication) or UMTS (Universal Mobile Telecommunications Service) network to prevent a misplaced or stolen phone from initiating calls

The IMEI number is used by a GSM network to identify valid devices and therefore can be used for stopping a stolen phone from accessing that network. For example, if a mobile phone is stolen, the owner can call his or her network provider and instruct them to "blacklist" the phone using its IMEI number. This renders the phone useless on that network and sometimes other networks too, whether or not the phone's SIM is changed.

Every GSM mobile phone has a unique serial number, called an International Mobile Equipment Identity (IMEI) number. This number is built into the phone's hardware by the manufacturer, not the SIM card which is supplied by the mobile carrier and can be removed and inserted into another phone.
The IMEI is only used for identifying the device and has no permanent or semi-permanent relation to the subscriber. Instead, the subscriber is identified by transmission of an IMSI number, which is stored on a SIM card that can (in theory) be transferred to any handset. However, many network and security features are enabled by knowing the current device being used by a subscriber.

integrated development environment (IDE)

is a software application that provides comprehensive facilities to computer programmers for software development. An IDE normally consists of a source code editor, build automation tools and a debugger. Most modern IDEs have intelligent code completion.

You can easily combine language support and other features into any of our default packages
Some IDEs contain a compiler, interpreter, or both, such as NetBeans and Eclipse; others do not, such as SharpDevelop and Lazarus. The boundary between an integrated development environment and other parts of the broader software development environment is not well-defined. Sometimes a version control system, or various tools to simplify the construction of a Graphical User Interface (GUI), are integrated. Many modern IDEs also have a class browser, an object browser, and a class hierarchy diagram, for use in object-oriented software development.is a software application that provides comprehensive facilities to computer programmers for software development. An IDE normally consists of a source code editor, build automation tools and a debugger. Most modern IDEs have intelligent code completion.
With its editors, code analyzers, and converters, you can quickly and smoothly upgrade your applications to use new Java 8 language constructs, such as lambdas, functional operations, and method references.(in Java)

Some IDEs contain a compiler, interpreter, or both, such as NetBeans and Eclipse; others do not, such as SharpDevelop and Lazarus. The boundary between an integrated development environment and other parts of the broader software development environment is not well-defined. Sometimes a version control system, or various tools to simplify the construction of a Graphical User Interface (GUI), are integrated. Many modern IDEs also have a class browser, an object browser, and a class hierarchy diagram, for use in object-oriented software development.

KNOW XAMARIN IN VISUAL STUDIO

Xamarin is a based softby the engineers that created Mono,Mono touch and Mono android  which are cross platform implementations of the common Language Infrastructure (CLI) and Common Language Specifications (often called Microsoft .NET).

ware company created
With a C# shared codebase, developers can use Xamarin tools to write native iOS, Android, and Windows apps with native user interfaces and share code across multiple platforms.Xamarin has over 1 million developers in more than 120 countries around the world as of May 2015

 Mono is a free and open source project led by Xamarin (formerly by Novell and originally by Ximian) to create an Ecma standard-compliant, .NET Framework-compatible set of tools including, among others, a C# compiler and a Common Language Runtime.

The stated purpose of Mono is not only to be able to run Microsoft .NET applications cross-platform, but also to bring better development tools to Linux developers.[4] Mono can be run on many software systems including Android, most Linux distributions, BSD, OS X, Windows, Solaris, and even some game consoles such as PlayStation 3, Wii, and Xbox 360.
 Xamarin for Visual Studio

Xamarin claims to be the only IDE that allows for native iOS, Android and Windows app development within Microsoft Visual Studio.Xamarin supplies add-ins to Microsoft Visual Studio that allows developers to build iOS, Android, and Windows apps within the IDE using code completion and IntelliSense. Xamarin for Visual Studio also has extensions within Microsoft Visual Studio that provide support for the building, deploying, and debugging of apps on a simulator or a device.In late 2013, Xamarin and Microsoft announced a partnership that included further technical integration and customer programs to make it possible for their joint developer bases to build for all mobile platforms. In addition, Xamarin now includes support for Microsoft Portable Class Libraries and most C# 5.0 features such as async/await. CEO and co-founder of Xamarin, Nat Friedman, announced the alliance at the launch of Visual Studio 2013 in New York.

VISUAL STUDIO 2015

 

Welcome to Visual Studio! We’ve got everything you need to create great apps for devices or desktop apps, for the web and in the cloud. Write code for iOS, Android, and Windows in one IDE. Get great IntelliSense, easy code navigation, fast builds, and quick deployment. Visual Studio increases your productivity and makes it easy to do your work alone or as part of a larger team.

Download Visual Studio Community for free to start coding right away. If you want to do cross-platform development, make sure that you install the optional packages. (You can get more features with other editions of Visual Studio.)

Jump right in, create a new project, and start writing code. Choose the type of app you want to create. Or you can take a tour of the Visual Studio IDE to get familiar with the tools.

And don’t forget to explore our code gallery to find samples to help you write your app more quickly!
 Extend Visual Studio

Add your own Visual Studio extension to include a tool or script that you often use while coding. You can create custom menu items and tool windows to integrate your own tools into the Visual Studio IDE. You can extend the Visual Studio editor to analyze and fix code, or add a new project type to include just what you need.

To find the latest version of the Visual Studio Extensibility Tools (VS SDK), see Visual Studio SDK.

You can use the .NET Compiler Platform (Roslyn) to write your own code analyzers and code generators. Find everything you need at Roslyn.

Find existing extensions for the VS IDE created by Microsoft developers as well as our development community.
Build apps for Android, iOS, and Windows

You can use Visual Studio to build apps for Android, iOS, and Windows devices. Learn more about it at Cross-Platform Development in Visual Studio.

For information about Universal Windows Apps (UWP), see Universal Windows Apps.

Choose the tools you need based on your app requirements and the language you want to use.

    Xamarin for Visual Studio: A common code base in C# for all devices

    Apache Cordova with Visual Studio: A common code base for HTML, CSS, and JavaScript or Typescript

    Visual Studio Tools for Unity: 2D/3D game development in C#

    C++ for Cross-Platform Development: Shared code libraries and apps in C++

    Visual Studio Emulator for Android : Visual Studio Emulator for Android: Debug and test your Android apps no matter the IDE