What Are Dual, Tri and Quad Band Cell Phones and Where Will They Work?



The world of the cell phone is a complicated one as of late, significantly for these questioning how one can begin a cellular phone enterprise. Few issues are maybe as complicated as GSM frequencies and GSM telephones that appear to work in some components of the world however not in others.

A number of band cell telephones and GSM frequencies could be particularly complicated for anybody questioning how one can begin a cellular phone enterprise.

So what’s the background behind the GSM community?

The GSM community was first urged by a bunch of European technicians and coverage makers in 1982 and it did not take lengthy for customers and telephone makers to undertake the brand new community after it first emerged in 1991. It wasn’t lengthy earlier than there was rising GSM protection in an growing variety of international locations.

The GSM world grew rapidly. There have been a couple of million subscribers unfold over 70 carriers in 30 international locations by the tip of 1993.

Not solely did the brand new GSM cellular community ship and obtain all of its info digitally, making it the primary 2G cell phone to be developed it additionally gave customers a substantial amount of freedom on what they did with it. For the primary time they have been capable of ship quick written messages to one another for a fraction of the value of a telephone name, they may change their service and/or go to a special nation with out getting a brand new telephone.

All they wanted to do was to take one GSM SIM card out and substitute it with one other GSM card and so they have been in enterprise.

However, because the unknown powers of the world decree, issues should not be that simple and the GSM frequencies set by many of the GSM networks had already been assigned to different functions by the powers that be.

So, in a scenario similar to TV watchers and other people with surveillance methods, a telephone that labored in Sussex England would not decide up something in San Antonio within the US. Mainly it wasn’t a case of 1 GSM frequency matches all.

Because of this, many cellular phone makers create cell telephones that may work with a couple of band with some working with as many as four bands.

Nonetheless this doesn’t suggest there aren’t questions and individuals are typically left asking:


  • What’s GSM?
  • What are the GSM frequencies?
  • Why do GSM telephones have a couple of band?
  • Will completely different frequencies work in several areas?
  • How can I test if a telephone will work in a selected space?
  • How are a number of band telephones outlined and the place will they work?


We will try to have a look at these questions on this article.

What’s GSM? GSM, International System for Cellular communications (or the Acronym formally often known as Groupe Spécial Cellular) is a wi-fi transmission customary used for cell phones and, just lately wi-fi modems. GSM and CDMA differ as a result of GSM networks use a SIM card to retailer all the mandatory info to ship and obtain calls the place with CDMA telephones the whole lot is stored on the telephones.

In case you are how one can begin a wholesale cell phone parts suppliers enterprise and you do not have hundreds in working capital GSM cell phones will most likely be a greater choice than CDMA as they will not be hooked up to a selected service and do not require you to be licensed to a selected supplier to promote unlocked cell telephones.

One more reason to pick out GSM over CDMA is that it’s going to open up the potential buyer base for every telephone. As unlocked gsm telephones can be utilized with any GSM networks. To this point there isn’t any such factor as an unlocked CDMA telephone. On the subject of cellular phone plans most suppliers (particularly these within the states) love CDMA telephones as a result of it locks their customers to them.

Why do GSM telephones have a couple of band? GSM Telephones include a couple of band in order that they’ll work in a couple of nation as there’s a couple of GSM frequency and they don’t seem to be universally transmitted.

Because of this, wholesale cellphone producers make GSM and GPRS telephones with a number of cellular phone bands in order that they’ll work in a number of international locations. Most cell telephones work on two, three and even 4 bands. Quad band telephones are probably the most versatile as they can be utilized all around the world and are sometimes known as worldwide telephones because of this.

How are a number of band telephones outlined and the place will they work? A number of band telephones are normally outlined by what number of GSM frequencies they’ll function on and normally are available 4 completely different classes, twin band, tri band and quad band. If enthusiastic about how one can begin a cellular phone enterprise you will need to bear in mind the completely different kind of bands because it might imply the distinction between your buyer getting a excessive efficiency telephone that they are pleased with and may and them getting a shiny and expensive paperweight.

Twin band telephone works with two GSM frequencies and, relying on the place the telephone is made will most likely work for the frequencies 900MHz and 1800MHz. These telephones are normally inexpensive than different sorts of cellular phone and it may be a great way to get an affordable cellular phone that may nonetheless ship SMS MMS and act as a WAP cellular phone.

The tri band telephone runs on three frequencies and can be utilized in most international locations. This unlocked GSM cellular phone is a less expensive choice than the quad band telephone however safer than a twin band telephone.

Quad band telephones, or worldwide telephones as they’re typically known as, use 4 bands and can be utilized wherever on this planet. In case you are seeking to begin a cell phone enterprise and also you marvel what’s an unlocked telephone assured to promote effectively and provide the least bother with clients it’ll most likely be this sort of cellphone.

What Are The GSM Frequencies? Nearly the entire world works on the frequencies 850Mhz, 900MHz, 1800MHz, 1900Mhz and in some uncommon circumstances 400MHz though there are another frequencies in different places.

Fortunately too areas the place every frequencies work is pretty simple to outline within the very common sense (though it at all times pays to test). So once you’re searching for what areas a mobile phone will work in it’s best to have the ability to observe a tough information.

So which areas use GSM 900 and 1800 MHZ alerts and which areas use the GSM 850Mhz and 1900MHz frequencies can normally be damaged into two teams.

In case you are touring in together with your cellular phone in Oceania, Africa, Europe, Asia (aside from Japan and Korea), the Center East, Brazil and the Baltic area and searching for roaming networks then cellular community protection will likely be both 900MHz, 1800MHz or 900MHz and 1800MHz.

In case you are searching for a GSM world telephone that may work within the US or South America then you definately’re higher sticking with a wi-fi cellular phone that’ll work on the 850Mhz and 1900MHz bands.

Will completely different frequencies work in several areas? With the vast majority of the GSM world being damaged into two foremost teams (people who take Many of the GSM world is roughly damaged up into 4 foremost frequencies 900MHz and/or 1800MHz and 850Mhz and/or 1900MHz most unlocked GSM telephones will work on one, two or three of the GSM frequencies all over the world supplying you with some degree of worldwide roaming on an unlocked telephone.

Nevertheless, you probably will not get any pleasure if for instance you’re taking a twin band telephone designed for Europe and Asia after which attempt to use that bluetooth telephone within the US.

How can I test if a telephone will work in a selected space? There are two methods to test if a telephone will work in a selected space; the primary is to get the telephone band, which may normally be discovered on the product description.

Should you’re working via how one can begin a cellular phone enterprise and contemplating telephones to inventory, it does not matter if you happen to’re enthusiastic about a multimedia cellular, WAP telephone or GSM watch telephone, the method needs to be the identical. In case you are sourcing cell telephones from a wholesale provider or wholesale dropship vendor put the ball into their courtroom. They need to have that info on their web site or product promoting materials for the unlocked cellular phone.

As soon as you’ve got acquired the GSM frequency the GSM telephone labored on you may make positive it’ll work in your space.

In case you are searching for a cellphone for your self this might be as simple as calling your native service supplier, or trying it up on websites like GSMworld dot com or worldtimezones dot com.

In case you are questioning how one can begin a cellular phone enterprise then your finest plan of action is to listing the frequencies on the outline for the GSM cellular phone, together with the telephone’s different options (like if it’s a music telephone or it has an excellent cellular phone digicam) and inform the one that desires to purchase unlocked cell telephones from you which of them components of the world it’ll most likely work in.

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