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Basically, the difference lie on the frequency being used or supported. For GSM dual band phones, the frequencies that is can support are 900/1800 MHz or 850/1900 MHz; for tri-band phones, the frequencies are 850/1900/2100 or 850/1700/2100 or 900/1900/2100 MHz or 900/AWS/2100; and for quad-band phones, the frequencies are 850 / 900 / 1800 / 1900

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How many channels they support, and in which countries they will work.

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Q: What are the differences between dual band and quad band phones?
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What countries are using quad band?

Europe and Asia use dual-band through quad-band phones that are at the minimum able to operate in the GSM 900 and/or 1800 frequency bands. In North America (at least those that are carrier-based) are predominantly only dual-band phones, are in GSM or CDMA bands, and are SIM-locked.


Is India using dual band or single band?

dual band


What is the function of a dual band router?

Single-band routers use a 2.4 GHz and are limited in range and speed compared to dual-band routers, which use both the 2.4 GHz and 5 GHz band. Dual-band routers are more efficient, have longer range, are less prone to interference from household devices, such as microwaves and older cordless phones, and are faster. Read more: http://www.bestdualbandrouter.com


Is iphones dual sim phones?

no they are not


What is the computer definition of dual band?

In IT field, dual band is associated with the wireless router. This router handles frequency bands of 802.11. Dual band routers support 11a users in 5GHz band and 11b/g users on the band of 2.4GHz.


What does a dual band router do?

Unlike ordinary routers that only support one wireless signal band, dual-band routers contain two different types of wireless radios. When first introduced many years ago, dual-band routers supported both 802.11a and 802.11b


On which band does airtel work in AP?

what is the band frequincy dual band single band


Do American phones work in England?

American cell phones do work in England as long as they are dual or tri-band handsets. Very cheap US cell phones do not generally work overseas. CDMA (Sprint/Verizon) No unless its a dual mode device with a SIM installed that's active GSM (TMobile/AT&T) Yes providing its a 900/1800/2100 band phone. Cheaper handsets from TMobile/AT&T are usually only dual band 850/1900 phones Remember also that Europe uses 220-240v mains not 110-120 that used in the US You can purchase one in England. Prepaid handsets start from US$20 and usually if you buy from a car phone warehouse they do not have a SIM LOCK installed so you can use nearly any SIM card


Does International cell phones cover every country?

It depends a bit on which phone you get, exactly. Broadly speaking a dual-band phone works in Europe and Asia, whereas a quad-band one should work pretty much everywhere you can get a signal.


What are the benefits of choosing dual sim phones over single sim phones?

The dual SIM phones allows users to have to SIM cards inside the battery compartment. The user can use a single phone to take calls for two different numbers.


Is the iphone5 a gsm phone?

Yes. iPhones have always been GSM phones. CDMA was introduced with the iPhone 4 and the 4S was the first iPhone to introduce dual band iPhones with GSM/CDMA antennas.


Can you flash a Analog TV Quad Band Dual?

can you flash aAnalog TV Quad Band Dual SIM Touch Screen Cell Phone to cricket