GSM Unlocked Mobile Phones are Unlocked GSM Phones which can be used with Any
GSM Wireless Network Anywhere in the World.
The Term Unlocked
is meant for Cellular Phones which have not been subsidized
and Locked by any Wireless Services Provider, therefore, unlocked phones
can work with any GSM Wireless Service anywhere in the World.
a Wireless Platform and the technology that carries the signal back and
forth from the phone to the receiver (Receiving Towers).
Unlocked GSM Phones
will only work on GSM Platform that means that your Wireless Service Provider
has to be a GSM Service Provider. In the USA, T-Mobile, Cingular GSM and
AT&T Digital GSM are the popular companies that use GSM Technology
to provide Wireless Services to their end users.
also called the Smart Card is a small chip that contains your wireless
service account information. You can insert the SIM Card into any unlocked
GSM phone and instantly transfer your phone number and account to the new
phone. If the Phone is locked, it may not accept your SIM Card.
is a Term used for Phones that will work with 900/1800/1900 MHz
Frequency in USA is 1900 MHz.
Australia, Asia and Africa,
the popular frequencies range between 900-1800 MHz.
and the Caribbean's
have a mix of 1900 along with 900/1800 MHz.
A Good source
to check for what frequency Maps in a certain region is the web site
by GSM association. Click
here to see the Maps.
Please check the GSM frequencies used in your country and make sure the mobile phone's frequency band matches that used in your country.
GSM (Groupe Special Mobile) = Global System for Mobile communications - most popular standard for mobile phones in the world.
GSM World Coverage Map and GSM Country List
GSM 900 / GSM 1800 MHz are used in most parts of the world: Europe, Asia, Australia, Middle East, Africa.
GSM 850 / GSM 1900 MHz are used in the United States, Canada, Mexico and most countries of S. America.
GSM Bands information by country:
Country / Territory
Mawson and Casey Stations (Australia)
GSM BTS &
Altobridge Gateway Platform
Marambio Base (Argentina)
AMPS technology &
Entel Chile GSM tower on King George Island
Antigua and Barbuda
Planned 3G 2100
3G 2100, 3G 850, 3G 900
3G 2100, 3G 850
3G 2100, 3G 850
Bosnia and Herzegovina
British Virgin Islands
Central African Republic
China, Hong Kong (SAR)
China, Macau (SAR)
Congo, Democratic Republic of the
Congo, Republic of the
East Timor (Timor-Leste)
Falkland Islands (Islas Malvinas)
French Guiana (French West Indies)
French West Indies
Gaza Strip / West Bank
Guadeloupe (French West Indies)
Holy See (Vatican City)
Isle of Man
3G 2100, 3G 1700
Martinique (French West Indies)
Northern Mariana Islands
Papua New Guinea
Saint Kitts and Nevis
Saint Pierre and Miquelon
Saint Vincent and the Grenadines
Sao Tome and Pr'cipe
Planned 3G 2100
South Georgia and the South Sandwich Islands
Timor-Leste (East Timor)
Trinidad and Tobago
Turks and Caicos Islands
United Arab Emirates
U S A
Planned 3G 2100
Virgin Islands (USA)
Wallis and Futuna
West Bank / Gaza Strip
Country / Territory
About Double SIM Phones
gsm double sim, dual gsm sim mobiles, mobile dual,mobile dual sim, mobile phone dual,mobile phone with dual sim,mobile phones dual: GSM phone with two sim cards
2 sim, mobile 2 sim: two sim cards, two sim card,two sim mobile
multi sim: multi-sim cards
phone 2 sim: phone with 2 sim cards
dual sim mobile price: two sim mobile
dual sim mobile shop: two sim mobile
dual sim price: two sim cards
dual sim qwerty, qwerty dual sim: qwerty keyboard
dual sim tv: with tv receiver
dual sim wifi gps: with wifi & gps navigation
dual standby, dual standby phones: the capability of receing two calls simultaneously
double sim mobile phone,double sim mobile phones,double sim mobile: two sim
dual cam,dual camera mobile, dual sim camera: two camera handset
dual sim gsm cdma, dual sim mobile gsm cdma,dual sim mobiles gsm cdma: with gsm & cdma
mobile 3 sim,three sim,triple sim: 3 sim cards
mobile world phones: for world wide use
touch dual sim: with touch panel
dual sim gsm cdma: with gsm & cdma
How to select a Mobile Phone
Most mobile phones sold on our web site have the following common features:
Internal Flash Card
When trying to select a phone model make sure it supports the GSM frequency bands used in your country. You can refer to this GSM frequency map for the frequency bands used in your country.
As a general guide for choosing the frequency bands, the following shows a briefe guideline:
Dual band: Can be used in Europe, Asia, Africa and Brazil, Venezuela, Colombia
Tri band: Can be used in USA, Canada, Europe, Asia, Africa and Latin Americas
Quad band: Can be used in almost all the countries in the world except Japan and South Karea
For example, if you want to buy a cell phone for use in USA, you will need a Tri-band or Quad-band cell phone.
The next feature of the phone you want to consider is the "Dual SIM dual standby" (see explaination bellow). Most brand named phones made by Nokia, Motorola, Samsung, DO NOT support this feature. If you are interested in high end mobile phones, you may want to look into these features:
Microsoft Windows CE based
These models of phones normally don't support "Dual SIM".
The 3rd thing you want to consider is the external shape of the phone. We offer the following types of phone shapes and operation modes:
iPhone like touch screen
Slide Open Design
Fold over Design
is a Term used for Phones that has two SIM sockets and allow the phone to work with both SIMs so a single phone will have two phone numbers.
is a Term used for Phones that supports multiple SIM sockets and allow the phone to work with one SIM at a time and user can select which SIM to be active and switch to the selected SIM so making and answering calls can be done for the active SIM.
is a Term used for Phones that supports multiple SIM sockets and allow the phone to work with both SIMs at the same time. Both SIMs are active to receive and make calls. No need to manually switch between SIMS. But you can only make and receive call from one SIM at a time. For example, when there is a incoming call for one of the SIMs and you pick up the call, you will not be able to make or receive calls for the second SIM until the call activities are stopped for the first SIM. In other words, call making and answering is not duplex.
is a Term used for Phones that supports multiple SIM sockets and allow the phone to work with both SIMs at the same time. Both SIMs are active to receive and make calls. No need to manually switch between SIMS. You can only make and receive call from both SIM at the same time. For example, when there is a incoming call for one of the SIMs and you pick up the call, you will be able to make or receive calls for the second SIM. Call receiving and answering is fully duplex.