Mobile Phone Technologies Explained

What is Push to Talk?
Often described as a "walkie-talkie" service using mobile phones, Push to talk over Cellular (PoC) is a service that makes one-on-one and group conversations possible over a cellular network. Press the button once and everyone can hear you talk - release the button and hear others talking back to you.

The Benefits of Push to Talk
  • Direct speech connection is spontaneous and convenient
  • Share information and experiences instantly, at any time
  • Get and stay in touch with a group of people - whether they're pre-set, impromptu, or open chat groups
  • Expanded range and roaming options over two-way radio
How Push to Talk Works
Phones with the PTT feature have a dedicated PTT button that is used to start a session. A session can involve from two to several participants. Only one person can talk at a time.

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What is Bluetooth?
Bluetooth is a technology for wireless communication between devices. It's based on a low-cost short-range radio link.

Why Bluetooth is Good for You
Every decorator knows that cables and wires are unsightly and confusing. Bluetooth connections allow wireless communication between devices within a range of about 30 feet (10 meters). Unlike infrared, you don't have to point devices directly at each other, or even have both devices in the same room. Bluetooth can initiate connections automatically with paired devices, so you don't even have to think about it. And no, you don't have to pay for a Bluetooth connection, no matter how much data you transfer.

How Bluetooth Works
When two devices share information, there are a few things that have to be worked out: firstly, how they will physically connect - through how many wires? Or none at all? - and then, what are the agreed commands that will make sense to both devices (the protocol)? Bluetooth is an industry standard that solves both of these issues cheaply, and using very little battery power.

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What is GPRS?
General Packet Radio Service is a technology that allows your phone to transfer data at moderate speeds.

The Benefits of GPRS
GPRS lets you send data faster than over a GSM data network, and it's also a lot more efficient. But "data" sounds pretty vague, right?

How GPRS Works
To use GPRS, you need a phone that supports it, a subscription from your network operator that supports GPRS, and the proper settings.

General Packet Radio Service does what it says: it sends "packets" of data over a radio wave (on the GSM network). Packet switching works like a jigsaw puzzle: your data is split into many pieces, then sent over the network and reassembled at the other end. GPRS is just one of the ways to transport these jigsaw puzzles.

What is EDGE?
Enhanced Data rates for Global Evolution (EDGE) enables data connections three times faster than GPRS within the same multislot class. Like GPRS, you're billed for the data you transfer, not for the time you spend connected.

The Benefits of EDGE
EDGE opens up a lot of possibilities for connecting to data networks on your mobile phone, making it far less frustrating to stream video and download larger files. How EDGE Works
To use EDGE, you need a phone that supports it, a subscription from your network operator that supports EDGE, and the proper settings.

EDGE is based on General Packet Radio Service, which sends "packets" of data over a radio wave (on the GSM network). Packet switching works like a jigsaw puzzle: your data is split into many pieces, then sent over the network and reassembled at the other end. GPRS is just one of the ways to transport these jigsaw puzzles.

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What is JAVA?

Java is both a programming language and a software platform, and it's used to create and run applications for Nokia phones.

What You Can Do With Java
With Java applications, your phone can do more of the things you'd like it to do. Downloading and installing applications is a relatively simple process (as is uninstalling them), and there is a wide range of applications available.

How Does Java Work?
Java was originally developed by Sun Microsystems. Enhancements and standardization of the Java platform are conducted by the Java Community Process (JCP), in which Nokia takes an active role together with Sun and other members.

There are two parts to Java technology: a programming language, and an environment in which those commands can be executed. You wouldn't expect much response if you started speaking Polish in Rio de Janiero, right? You need an environment where the language means something, so Java brings its own environment along.

Java-enabled Nokia phones - most Nokia models on the market now - contain a Java Virtual Machine, which is ready to run applications written in Java. This makes using new applications easy, because you usually don't have to configure, load, or install anything else.

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What is MMS?
MMS stands for Multimedia Messaging Service, a technology that allows you to create, send, and receive text messages that also include an image, audio, and/or video clip. MMS messages are sent from one mobile phone to another, or to an email address.

What's in It for Me?
Multimedia messaging enriches your mobile messages in much the same way as inserting photos or changing fonts and colors does in email - it's both useful and expressive. MMS messages are sometimes considered equivalent to so-called "picture messaging," popularized by the recent imaging phones boom, but other uses of the technology do exist.

How Does MMS Work?
You don't need to have an imaging phone to send and receive MMS messages, just an MMS-enabled mobile phone, an operator agreement that supports the service, and the correct settings on your handset. Of course, an imaging phone gives you the option of creating and passing on your original images.

An MMS message is a multimedia presentation in a single entry, unlike an email with attachments, making it easier to create and simpler to deliver than an email with attachments. MMS is a scalable technology, which means it's suitable for most types of mobile phones. And MMS is compatible with fixed email addresses, so it is possible to criss-cross back and forth over the mobile-PC border.

What is Mobile Video?

Mobile video means both creating your own video clips and watching content created by others. There are two types of mobile video content services: downloadable and streaming. You can download, store, and play back videos on your mobile device. Or, you can stream video content, which is a better option for viewing longer clips because data isn't stored on your phone. You can also tune in to live video feeds using streaming.

What You Can Do With Mobile Video
  • Use a phone equipped with a camera to record your own clips, then send them (by email, MMS, or over a wireless connection using Bluetooth technology or infrared)
  • Watch streamed news, sports, music videos, or movie trailers
  • Watch live camera views such as road conditions, concerts, parties, etc.
  • Subscribe to MMS videos or download short video content such as daily news, weather, or cartoons
  • Store your favorite videos on a MultiMediaCard (MMC) card - longer clips can fit on an MMC card as long as it has enough capacity

How Mobile Video Works
Unless the video you want to watch is already stored on an MMC card, your phone must be able to connect to the Internet in order to access video files. This means you need a phone with a GPRS, EDGE, WCDMA or other network connection, and the correct settings. If you're interested in streaming video, look for a phone that supports EDGE or WCDMA.