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Cellular Phones - A Technology Review

       Cell (short for cellular) phones, also known as mobile phones or wireless phones, are small hand-held phones with built-in antennas. Unlike home phones, cell phones can be carried from place to place with ease. This makes them a good choice for people who want to be in touch with other people even when they are away from the house.

                Notable among these phones are the ones known as smart phones. Though earlier varieties of cell phones were developed without a microprocessor, most recent mobiles have been based on a microprocessor and a dedicated Operating System such as Android. These are also known as smart phones because they accommodate complex functionalities such as writing office documents, VOIP phone calls, etc.

               A cell phone operates in conjunction with a cell tower that receives signals from a cell phone and forwards the same towards destination. Three widely used technologies in cellular phones are
 

  • a. GSM (Global System For Mobile Communication)
  • b. CDMA (Code Division Multiple Access)
  • c. iDEN (Integrated Digital Enhanced Network)

The protocols followed include 2G, 3g, 3.5G, and 4G (Developmental). Progressively, these technologies offer value added services like VOIP, broadband Internet, and video calls.

Some of the important features of cellular phones include


  • Camera in mobile phones
  • Accessing internet from mobile phones using VoIP
  • Applications like Office Document Support
  • Interfaces support like USB, HDMI, Wi-Fi, Bluetooth, and Infrared
  • Audio/Video formats in mobile phones
  • Single SIM v/s Dual SIM mobile phones, and others.


        Further, with the advent of high speed low power processors, and free mobile Operating Systems such as Android, the smart phone have become more affordable and feature rich.
       A comprehensive comparison of all the features of cell phones is provided in the article on Cell Phone Selection Guide

Few of the recently added articles available include the following:

WiMAX, LTE and 3G/3.5G and Comparison: The article provides a comprehensive review of these technologies, and compare the same. Advantages and disadvantages have also been discussed.

Satellite Phones - A Buyers Guide: The article discusses various satellite phone manufacturers, and the advantages of using the same over others. Important features of have also been discussed.

A Tutorial on IPv6: Traditional IP address space has been depleting very fast. As a result, IPv6 is becoming order of the day to provide much needed IP addressability to various resources on the Internet. The tutorial discusses IPv6 addressing scheme.

Surface Mount Assembly and Rework With the advent of miniaturization in electronics, component sizes are shrinking from time to time. The article discusses various techniques used for surface mount component assembly and testing.

Computer Printers and Scanners - A Review: A comprehensive review of computer printers starting from character printers has been provided.

Co-axial Cable Insertion and Return Loss Measurement For rf equipment, the measurement of insertion and reflection losses is very important. The article provides step by step procedure for measurement of the same.

Microsoft VB.NET Drag-n-Drop Programming, and others

Please visit TutorialsWeb.com www.tutorialsweb.com/ for reading these articles.

Key Words : cell phone ,  cellular phone ,  mobile phone ,  cellular tower ,  cell phone os ,  tutorialsweb

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