computer science

Mobile phone feature

Mobile phone feature is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Mobile phone feature rather than just read about it. In short: A mobile phone feature is a capability, service, or application that a mobile phone offers to its users. With the advent of feature phones, mobile phones gained a wider range of features.

Key takeaways

Mobile phone feature belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Mobile phone feature to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Mobile phone feature from memory before moving on to harder problems.

Reference excerpt

A mobile phone feature is a capability, service, or application that a mobile phone offers to its users. With the advent of feature phones, mobile phones gained a wider range of features. The common components found on all phones are:

A number of metal–oxide–semiconductor (MOS) integrated circuit (IC) chips. A battery (typically a lithium-ion battery), providing the power source for the phone functions. An input mechanism to allow the user to interact with the phone. The most common input mechanism is a keypad, but touch screens are also found in smartphones. Basic 0758995183 to allow users to make calls and send text messages. All GSM phones use a SIM card to allow an account to be swapped among devices. Some CDMA devices also have a similar card called a R-UIM. Individual GSM, WCDMA, IDEN and some satellite phone devices are uniquely identified by an International Mobile Equipment Identity (IMEI) number. All mobile phones are designed to work on cellular networks and contain a standard set of services that allow phones of different types and in different countries to communicate with each other. However, they can also support other features added by various manufacturers over the years:

roaming which permits the same phone to be used in multiple countries, providing that the operators of both countries have a roaming agreement. send and receive data and faxes (if a computer is attached), access WAP services, and provide full Internet access using technologies such as GPRS. applications like a clock, alarm, calendar, contacts, and calculator and a few games. Sending and receiving pictures and videos (by without internet) through MMS, and for short distances with e.g. Bluetooth. In Multimedia phones Bluetooth is commonly but important Feature. GPS receivers integrated or connected (i.e. using Bluetooth) to cell phones, primarily to aid in dispatching emergency responders and road tow truck services. This feature is generally referred to as E911. Push to Talk over Cellular, available on some mobile phones, is a feature that allows the user to be heard only while the talk button is held, similar to a walkie-talkie. A hardware notification LED on some phones.

MOS integrated circuit chips A typical smartphone contains a number of metal–oxide–semiconductor (MOS) integrated circuit (IC) chips, which in turn contain billions of tiny MOS field-effect transistors (MOSFETs). A typical smartphone contains the following MOS IC chips.

Application processor (CMOS system-on-a-chip) Flash memory (floating-gate MOS memory) Cellular modem (baseband RF CMOS) RF transceiver (RF CMOS) Phone camera image sensor (CMOS image sensor) Power management integrated circuit (power MOSFETs) Display driver (LCD or LED driver) Wireless communication chips (Wi-Fi, Bluetooth, GPS receiver) Sound chip (audio codec and power amplifier) Gyroscope Capacitive touchscreen controller (ASIC and DSP) RF power amplifier (LDMOS)

User interface

Besides the number keypad and buttons for accepting and declining calls (typically from left to right and coloured green and red respectively), button mobile phones commonly feature two option keys, one to the left and one to the right, and a four-directional D-pad which may feature a center button which acts in resemblance to an "Enter" and "OK" button. A pushable scroll wheel has been implemented in the 1990s on the Nokia 7110.

Software, applications and services

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Mobile phone feature

Start with the simplest possible case. Write down what Mobile phone feature claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Mobile phone feature before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Mobile phone feature ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Mobile phone feature

In research: Mobile phone feature appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Mobile phone feature in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Mobile phone feature is common in secondary-school and first-year university syllabi. It links to neighbouring topics Mobile phones, Software features, so understanding it makes those chapters shorter.
In everyday life: Look for Mobile phone feature outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Mobile phone feature in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Mobile phone feature means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Mobile phone feature out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mobile phone feature in simple terms?

A mobile phone feature is a capability, service, or application that a mobile phone offers to its users. With the advent of feature phones, mobile phones gained a wider range of features.

Why does Mobile phone feature matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Mobile phone feature?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Mobile phone feature.