2.  Android, the world's most popular mobile
platform
 Android powers hundreds of millions of mobile
devices in more than 190 countries around the
world. It's the largest installed base of any
mobile platform and growing fast—every day
another million users power up their Android
devices for the first time and start looking for
apps, games, and other digital content.
 Android gives you a world-class platform for
creating apps and games for Android users
everywhere, as well as an open marketplace
for distributing to them instantly.

3.  Android is the name of the mobile operating system
made by American company; Google. It comes
installed on a variety of smart phones and tablets,
offering users access to Google’s own services like
Search, YouTube, Maps, Gmail and more.
 This means you can easily look for information on the
web, watch videos, search for directions and write
emails on your phone, just as you would on your
computer. This is handy for checking up on things like
train times and getting directions when out and
about, but there’s more to Android than these simple
examples.

5.  Every day more than 1 million new Android devices
are activated worldwide. Android’s openness has
made it a favourite for consumers and developers
alike, driving strong growth in app consumption.
Android users download more than 1.5 billion apps
and games from Google Play each month.
 Building on the contributions of the open-source Linux
community and more than 300 hardware, software,
and carrier partners, Android has rapidly become the
fastest-growing mobile OS.With it's partners, Android is
continuously pushing the boundaries of hardware
and software forward to bring new capabilities to
users and developers. For developers, Android
innovation lets you build powerful, differentiated
applications that use the latest mobile technologies.

6.  Easily optimize a single binary for phones, tablets, and other devices.
Android gives you everything you need to build best-in-class app
experiences. It gives you a single application model that lets you deploy
your apps broadly to hundreds of millions of users across a wide range of
devices—from phones to tablets and beyond.
 Android also gives you tools for creating apps that look great and take
advantage of the hardware capabilities available on each device. It
automatically adapts your UI to look it's best on each device, while
giving you as much control as you want over your UI on different device
types. For example, you can create a single app binary that's optimized
for both phone and tablet form factors. You declare your UI in
lightweight sets of XML resources, one set for parts of the UI that are
common to all form factors and other sets for optimizations specific to
phones or tablets. At runtime, Android applies the correct resource sets
based on its screen size, density, locale, and so on. To help you develop
efficiently, the Android Developer Tools offer a full Java IDE with
advanced features for developing, debugging, and packaging Android
apps. Using the IDE, you can develop on any available Android device
or create virtual devices that emulate any hardware configuration.

7.  Design
 Because Android phones are made by a variety of manufacturers, you have
a variety of options when selecting a handset. That means that you can
choose one that fits your needs. One of the most important things to consider
when looking at a phone's design is whether or not it includes a full keyboard.
Many of today's Android phones are touch-screen-only devices, and while
they may look cool, they're not always as usable as their keyboard-equipped
counterparts. A full QWERTY keyboard can add a bit of bulk to the phone,
especially if it's a keyboard that slides out of sight when you're not using it,
but that can be worth the convenience that comes with having an actual
keyboard to type on.
 Other features to consider when looking at a phone's design are screen size
and resolution. More and more phones are offering super-sized screens -- 4-
inches to 4.3-inches diagonally, or even bigger -- which are certainly easy on
the eyes. But a bigger screen may mean a bigger phone, and a bigger
phone may be hard to slip into a pocket. A bigger phone also can be
uncomfortable to hold next to your ear during lengthy phone calls.
 A screen's resolution can be just as important as its size. In general, the higher
the resolution, the crisper and clearer the display will look. Whenever
possible, try the phone out in a store before you buy it. See how the display
looks to you. You should also try it out in various lighting conditions, as
different lights -- especially bright sunlight -- can drastically affect the look of
the screen.

8. Manufacturer
 The open nature of the Android platform also means that it's
possible to make changes to the look and feel of the OS itself.
That means that an Android phone made by HTC may operate
a bit differently than one made by Samsung. Some
manufacturers put overlays on top of the Android OS, which
alter its interface slightly. Samsung, for example, uses its TouchWiz
interface, which adds widgets that let you access various phone
features and online resources (like social networks) more easily.
Motorola, meanwhile, offers a MotoBlur interface, which
aggregates information from a variety of social networks and
delivers it to you in a constantly-updated feed.
 These overlays or interfaces vary from manufacturer to
manufacturer, and from phone to phone. Motoblur, for
example, will look a lot different on a phone with a 3-inch screen
than it will on a phone with a 4.3-inch screen. Whenever you
have the chance, try out the phone before you buy it, so you
know what the experience of using it will be like.

9. Google is constantly working on new versions of the Android software.
These releases are infrequent; at the moment they normally come out
every six months or so, but Google is looking to slow this down to once a
year.
 Versions usually come with a numerical code and a codename that’s so
far been named after desserts running in alphabetical order.
 Android 1.5 Cupcake
 Android 2.1 Eclair
 Android 2.2 Froyo
 Android 2.3 Gingerbread
 Android 3.2 Honeycomb - The first OS design specifically for a tablet,
launching on the Motorola Xoom
 Android 4.0 Ice Cream Sandwich: The first OS to run on smart phones
and tablet, ending the 2.X naming convention.
 Android 4.1 Jelly Bean: Launched on the Google Nexus 7 tablet by Asus
 Android 4.2 Jelly Bean: Arrived on the LG Nexus 4
 Google also releases minor updates with bug fixes and improvements.

10.  An Android phone is a smart phone running on
Google's open-source Android operating system.
Many different manufacturers make Android phones,
including HTC, Motorola, and Samsung. Dozens and
dozens of different Android phones are now
available, and all of the major cellular carriers in the
U.S. offer Android phones.
 Originally derived from the Linux desktop operating
system, Android is a customizable platform that can
look and feel very different on very different
handsets. That means that an HTC Android phone will
look and operate differently than an Android phone
made by Samsung. It also means that an HTC
Android phone from T-Mobile won't be exactly like an
HTC Android phone that runs on Sprint's network.

11.  Android phones are highly customisable and as such can be
altered to suit your tastes and needs. You can check your Face
book and Twitter profiles through a variety of apps making it
ideal for social networking. Through the calendar you can set
reminders from your desktop or your phone and on the latest
versions of Android you can send links to and from your
computer and vice versa.
 Another neat feature of Android is that it automatically backs up
your contacts for you. When you set up an Android phone you’ll
need to create a Google Account or sign in with an existing one.
Every time you save a number to the address book of your
Android phone it will be synced to your Google Account.
 The benefit of this is if you lose your phone all of your numbers will
be saved. The next time you get an Android phone and sign in
with your Google Account, all of your contacts and friends
numbers will be displayed in your new phone’s address book
and you can even access or edit them from a computer.

12.  There are hundreds of thousands of apps and games available
to download from the Google Play store (formerly the Android
Market). There are camera apps that allow you to take pictures
with artistic effects and filters on them and music players which
allow you to import MP3s from your phone or create playlists.
You can customise the appearance of your Android handset
with a number of wallpapers based on pictures you’ve taken
yourself or downloaded from the web too.
 There are also various on-screen widgets to download which
allow access and alteration the settings of your phone without
having to dive through menus as you would on rival devices. You
can pretty much create your own system of shortcuts and
menus to better suit how you uniquely use your phone.
 Popular games available for Android phones include Angry Birds,
Draw Something and Temple Run 2 to name but three, but there
are thousands of free and paid apps and games on offer.

13.  The majority of apps can be downloaded from the Google Play store (the
equivalent of Apple’s App Store), which includes a mix of free as well as
premium apps that you’ll have to pay for. Some apps have ‘lite’ versions
which are free, in the hope you’ll enjoy them and upgrade to the full
premium version. Others - like Angry Birds - are free, but include adverts.
 The same account that lets you backup your contacts can also have
financial details added to it, allowing you the ability to purchase content
from the Google Play store directly. You can pay either by debit or credit
card and initial setup takes less than five minutes from a computer.
 Although there are some 700,000 apps available to Android users in the
Google Play store, some developers choose to make their apps available to
download from their own sites. In order to download these you'll have to
change some settings on your phone before visiting the site on your Android
phone’s web browser. By downloading apps other than from the Google
Play store, you do run the risk of attack in the form of data theft or from a
virus so be careful if you choose that route.
 Should you upgrade or change your Android phone; log into your Google
account and you’ll be able to download your previously owned apps again,
without being charged.

14.  Android phones come in many different shapes, colours
and sizes. Some have super-fast processors, some have
powerful cameras and a few have hardware QWERTY
keyboards.
 All current Android phones feature a touch screens, the
size of which varies, but in most cases it measures at least
3-inches diagonally, although some devices use much
larger displays; like the Samsung Galaxy Note 2 for
example which features a 5.5-inch screen and has been
described as a 'phablet' - a cross between a phone and
tablet.
 Popular Android phones include the Samsung Galaxy S3
(4.8-inch), LG Nexus 4 (4.7-inch), Sony Xperia S (4.3-inch)
and HTC Desire C (3.5-inch). Some examples of Android
phones with hardware QWERTY keyboards include the HTC
Desire Z, HTC ChaCha and Sony Xperia Mini Pro.

15.  Every handset maker is free to make an
Android phone if they want to. As well as
the aforementioned HTC, Motorola,
Samsung, LG and Sony, Acer, Alcatel,
Huawei and ZTE have all made Android
phones too. Apple, Nokia and RIM (who
make BlackBerry smart phones) do not
offer Android handsets however.

16.  1. Android is open - Because it is Linux based open source so it
can be developed by anyone.
2. Multitasking - Android phones can run many applications, it
means you can browse while listened to the song.
3. Easy access to the Android App Market - Android owners are
people who love mobile phones application, with Google's
Android App Market you can download many applications for
free.
4. Can install a modified ROM - We sometimes find an unofficial
ROM. That is the version that was not in accordance with the
specification release our cell phones, the last way is
modification. Do not worry there are many custom ROM that
you can use on Android phones, and guaranteed not to harm
your device.

17.  1. Need internet connection - Android requires an active internet
connection. At least there should be a GPRS internet connection
in your area, so that the device is ready to go online according
to our needs.
2. Advertising - Application in the Android phones can indeed
be obtained easily and for free, but the consequences in each
of these applications, will always be ads on display, either the
top or bottom of the application.
3. Wasteful Battery - Android more wasteful than any other
operating system, because this operating system is a lot of
"process" in the background that lead to the battery quickly
drains.
4. Many applications contain virus - the virus inserted android
applications including Counter Strike Ground Force, Puzzle Sexy
Girls, Sexy Girls Photo Game, etc. Android Application contain
virus also present in the Android Market.

18.  When you sign in to your phone or tablet with
Google, you can access all of your Google stuff
(contacts, photos, Gmail and more) quickly and
easily. You can also enjoy all of your favourite
entertainment across your Android devices and even
your computer — no wires, no syncing.
 Play everywhere you go
 Google Play is the easiest way to enjoy all your
favourites — no wires, no hassle, just pure
entertainment. You can now read, listen and watch
anywhere you want — on your tablet, phone, or in
any browser at play.google.com. Forget about
cables and syncing: your favourite music, movies,
books, apps and games are instantly available across
all of your devices and on the web.

19.  Widgets . Put the important stuff right within reach and interact with
your favourite apps directly from your home screen with widgets —
see the latest sport scores, view your favourite photos, check the
weather or peek at your inbox all without having to open different
apps or leave the home screen.
 Notifications . An easy-to-read notification tray gives you quick
access to your calls, incoming texts, and new emails in a non-
intrusive way.
 Multi-tasking . With Android, you can quickly and seamlessly switch
between apps and pick up whatever you were doing. Juggling
multiple tasks at once on a mobile device has never been easier.
 Voice typing and actions .Control your Android device with your
voice. Simply touch the microphone on the keyboard and start
talking to write emails, SMS, or any other text — more than 30
languages supported. Text appears in real time, so there’s no
waiting.