Cellular Phones : Different Types Of
Mobile Screens & Operating System
3. Touch Screen: Touch screen mobile
phones provide keypad with touch screen technology, which
simply means that a keypad will be displayed on the screen
and you can use it by touching the keys on the screen. Each
touch gives a vibrating response.
Earlier touch screen phones provided a tactical keypad,
which were used as basic keypad. For entering alphabet you
had to touch the key specific number of times.Soon most
of the touch screen mobile phones started providing QWERTY
Some touch screen phones also come with handwriting input.
For handwriting input you will have to write in a particular
fashion for it to get recognized. Touch screen phones are
very useful for people who like fast navigation on their
phone. Touch screen phones usually have large screens hence
consume more power and require frequent charging.
Some mobile phones have combined different keypad types
resulting in following types of phones:
1. Touch screen with Tactile keypads: These
phones have touch screen facility along with basic keypad. Touch
screen provides good navigation and the keypad improves the
text input. These phones have small screen and need a stylus
or fingernail tip for precise input. Presence of touch screen
means power usage of the device is high but not as much as of
a complete touch screen phone. To incorporate both touch screen
and keypad, size of these phones is larger as compared to a
usual "candy bar" or complete touch screen mobiles.
2. Touch screen with QWERTY keypads: These
phones provide QWERTY keypads with touch screen. These phones
have advantage of both QWERTY keypad and touch screen. QWERTY
keypad makes text input very easy and faster where as touch
screen makes navigation very simple because you can click wherever
you want focus on the screen.
The main consideration is that these phones are very bulky
and consume more power, which is similar to mobile phones with
touch screen and tactile keypad. The keypad can be kept just
below the screen thus reducing the screen size or it can be
kept under the screen and can be opened by sliding.
1.2. Mobile Phone Operating Systems
A smartphone (a high-end mobile phone that offers more advanced
computing ability and connectivity) runs a complete mobile operating
system. Such operating systems can be installed on many different
phone models. They can run third-party applications, using an
application programming interface.Widespread examples are: