The Iphone World

Posts Tagged ‘Wireless’

A mobile phone or cell phone is an electronic telecommunications piece of equipment. The majority of current cell phones connect to the network using a wireless radio wave transmission technology, although satellite phones are exceptions. These cell phones communicate by means of a cellular network of base stations, which are known as cell sites, which is in turn linked to the conventional telephone network and were first introduced in the early to mid 1980s, the so called 1G generation.

Earlier cell phones operating without a cellular network, the so-called 0G generation, such as Mobile Telephone Service, date back to 1946. In anticipation of the mid to late 1980s, most cell phones were sufficiently big that they were time and again permanently installed in vehicles as car phones. In the midst of the advance of miniaturization, at this time the vast majority of cell phones are handheld.

Features of a cell phone
In addition to the usual voice function of a telephone, a cell phone can hold up many additional services such as SMS for text messaging, packet switching for access to the Internet, and MMS for transferring and receiving photos and video. A number of the world’s largest cell phone manufacturers consist of
• Alcatel
• Audiovox
• Fujitsu
• Kyocera
• LG
• Motorola
• NEC
• Nokia,
• Panasonic (Matsushita Electric)
and a lot more…..

There are in addition specialist communications systems related to, but separate from cell phones, such as Professional Mobile Radio. Mobile phones are also distinct from cordless telephones, which in general operate only within a limited range of a specific base station. Technically, the term cell phone includes such devices as satellite phones and pre-cellular mobile phones such as those operating via MTS that do not have a cellular network, while the related term cell(ular) phone does not. In actual fact, the two terms are used almost interchangeably, with the favored term varying by location.

Technology on which cell phone works
Cell phones and the network they function under vary a lot from provider to provider, and even from nation to nation. On the other hand, all of them communicate through electromagnetic radio waves with a cell site or base station, the antennas of which are by and large mounted on a tower, pole, or building. The cell phones have a low power transceiver so as to transmit voice and data to the nearby cell sites, usually 5 to 8 miles away.

When the cellular phone or data device is turned on, it registers with the mobile telephone exchange, or switch, with its only one of its kind identifiers, and will then be alerted by the mobile switch as soon as there is an incoming telephone call. The handset continuously listens for the strongest signal being received from the neighboring base stations. As the user moves in the region of the network, the mobile device will hand off to new cell sites.

Cell sites have comparatively low power (habitually only one or two Watts) radio transmitters, which broadcast their being there and relay communications involving the mobile handsets and the switch. The switch in turn connects the call to a different subscriber of the same wireless service provider or to the public telephone network, which includes the networks of other wireless carriers. The conversation between the handset and the cell site is a stream of digital data that includes digitized audio (except for the first generation analog networks).

The technology or the know-how that achieves this depends on the system that the cell phone operator has adopted. A number of technologies include AMPS for analog, and TDMA, CDMA, GSM, GPRS, EV-DO, and UMTS for digital communications.

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• VGA digital camera (640 x 480) with video capture; 5 MB memory (not expandable)
• Bluetooth for handsfree communication; full duplex speakerphone; access to personal email; web browser; SMS/MMS/EMS messaging
• Up to 6.67 hours of digital talk time and 250 hours of standby time

Thin is definitely in. At just over a half-inch thick, the Motorola RAZR V3 is the perfect combination of sleek design and powerful features. With long-range Bluetooth, support for video playback, a VGA (640 x 480) camera and a gorgeous color screen, the RAZR V3 is everything you’re looking for in a stylish mobile companion. The Motorola RAZR V3 is truly an impressive quad-band phone. And now it is available in gorgeous satin pink for those who want to kick up the style.

• Camera, Digital Player, FM Radio, MP3 Cell Phone –
• GSM -
• Bluetooth -
• Digital Camera, Digital Player

The W580i is a sleek, slim, street-style slider phone – and portable music device. Tempting to touch, designed to impress. When you’re out and about, you can have your favorite music with you wherever you go. And your picture library and favorite Web sites. W580i is for active people.

• Kid-friendly clamshell phone in shiny pink for use with Kajeet pay-as-you-go service
• Pay for just the minutes you use or choose monthly talk/text plans; optional GPS locator service
• VGA camera, handsfree communication via speakerphone and Bluetooth, voice dialing capabilities, personal organizer tools
• Up to 3.5 hours of talk time
• Includes: handset, rechargeable battery, charger, earbud

The Sanyo Katana II mobile phone enhances the spirit of the original Katana with a sleeker shape, a radiant new pink fascination finish, and a host of kid-friendly features. This flip phone also features a 21 MB memory for storing downloadable ringtones and games, a VGA camera, Bluetooth connectivity for handsfree devices, voice dialing capabilities, and up to 3.5 hours of talk time. It works perfectly with Kajeet’s kid-friendly pay-as-you-go service and it’s GPS-capable, which provides compatibility with Kajeet’s GPS Phone Locator Service as well as enable it to provide location information to a capable emergency service provider.

• For use with Tmobile Wireless service
• Internet browsing, IM’s, text & video messaging and email
• 1.3 megapixel camera, flashlight, ringtones, games
• Phonebook capacity 2000 names & numbers
• BLUETOOTH, plus QWERTY keyboard, swivel screen, stores music, songs, videos

Your social lifeline  as dressed by iconic designer Diane von Furstenberg. This limited-edition Sidekick 3 has all the features you love, wrapped up in a chic, flirty, fashionable style featuring Diane’s signature hot-pink lips. Stay connected the way you want, when you want  and look great doing it.