Buyers Guide For Unlocked GSM Cell Phones

By: Wasim Rangoonwala

Overview

GSM: The term used for Global Systemfor Mobile Communication. It is a worldwide accepted cellular networkstandard which uses a SIM (Subscriber Identification Module) card tomake and receive calls and data over the network. The SIM card holdsthe phone number assigned by the service provider, your phonebook andother registration information. GSM standard is used by approximately213 countries with over 3 billion people. GSM network uses fourfrequency range 850 MHz, 900 MHz, 1800 MHz and 1900 MHz.

Dual-band:

These phones will work around the world but not in United States and Canada.

Frequency Operation Mode: 900 MHz and 1800 MHz.

Countries: Europe, Africa, Asia, Australia, New Zealand and much of South America.

Tri-band:

Thesephones will work around the world including United States and Canadabut will not work with the service provider that only supports 850 MHzfrequency.

Frequency Operation Mode: 900 MHz, 1800 MHz and 1900 MHz.

Countries: Europe, Africa, Asia, nearly all of United States, Australia and New Zealand.

Quad-band:

Quad band phones will work all over the world with all GSM service providers.

Frequency Operation Mode: 850 MHz, 900 MHz, 1800 MHz and 1900 MHz.

Countries: Europe, Africa, Asia, United States, Australia, New Zealand, South America and almost all the countries.

Ifyou are purchasing a Cell Phone check the above frequency band and makesure that the cell phone band is supported in the country. UnitedStates support 850 MHz and 1900 MHz frequency band. Majority ofcarriers in US such as T-Mobile, Cingular uses 1900 MHz frequency andin some state Cingular uses 850MHz frequency band.

What is Unlocked GSM Cell Phones?

Mostcell phones service provider companies such as T-Mobile, Cingular etcprovide cell phones to users which are network locked. This means that,the phones can only be worked with their company's network.For example,a locked phone from T-mobile wouldn't work with Cingular's service. Soif you want to use your cell phone anywhere in the world with anyservice provider you have to purchase unlocked cell phones which arenot Network Locked by any service provider and you have to justtransfer your existing SIM card into your new unlocked phone and yourphone is all set to make and receive calls.

By purchasing anUnlocked GSM Cell Phone a customer is having a freedom to switchbetween cellular companies anytimeFree Web Content, anywhere all over the world.Forpurchasing Unlocked GSM Cell Phones please visit http://www.eStoreOffer.com

Cell Phones
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 
 • 

» More on Cell Phones