The Cell Phone Mysteries - What Are Dual, Tri and Quad Band Cell Phones and Where Will They Work?

The world of the mobile phone is a confusing one these days, particularly for those wondering how to start a cell phone business. Few things are perhaps as confusing as GSM frequencies and GSM phones that seem to work in some parts of the world but not in others.

Multiple band cell phones and GSM frequencies can be especially confusing for anyone wondering how to start a cell phone business.

So what is the background behind the GSM network?

The GSM network was first suggested by a group of European technicians and policy makers in 1982 and it didn't take long for consumers and phone makers to adopt the new network after it first emerged in 1991. It wasn't long before there was growing GSM coverage in an increasing number of countries.

The GSM world grew quickly. There were more than one million subscribers spread over 70 carriers in 30 countries by the end of 1993.

Not only did the new GSM mobile network send and receive all of its information digitally, making it the first 2G mobile phone to be developed it also gave users a great deal of freedom on what they did with it. For the first time they were able to send short written messages to each other for a fraction of the price of a phone call, they could change their carrier and/or go to a different country without getting a new phone.

All they needed to do was to take one GSM SIM card out and replace it with another GSM card and they were in business.

But, as the unknown powers of the world decree, things shouldn't be that easy and the GSM frequencies set by most of the GSM networks had already been assigned to other purposes by the powers that be.

So, in a situation very similar to TV watchers and people with surveillance systems, a phone that worked in Sussex England wouldn't pick up anything in San Antonio in the US. Basically it wasn't a case of one GSM frequency fits all.

As a result, many cell phone makers create cell phones that can work with more than one band with some working with as many as 4 bands.

Still this doesn't mean there aren't questions and people are often left asking:

What is GSM?
What are the GSM frequencies?
Why do GSM phones have more than one band?
Will different frequencies work in different areas?
How can I check if a phone will work in a particular area?
How are multiple band phones defined and where will they work?

We're going to attempt to look at those questions in this article.

What is GSM? GSM, Global System for Mobile communications (or the Acronym formally known as Groupe Spécial Mobile) is a wireless transmission standard used for mobile phones and, recently wireless modems. GSM and CDMA differ because GSM networks use a SIM card to store all the necessary information to send and receive calls where with CDMA phones everything is kept on the phones.

If you are looking at how to start a cell phone business and you don't have thousands in working capital GSM mobile phones will probably be a better option than CDMA as they won't be attached to a particular carrier and don't require you to be licensed to a particular provider to sell unlocked cell phones.

Another reason to select GSM over CDMA is that it will open up the potential customer base for each phone. As unlocked gsm phones can be used with any GSM networks. To date there is no such thing as an unlocked CDMA phone. When it comes to cell phone plans most providers (especially those in the states) love CDMA phones because it locks their consumers to them.

Why do GSM phones have more than one band? GSM Phones come with more than one band so that they will work in more than one country as there is more than one GSM frequency and they are not universally transmitted.

As a result, wholesale cellphone manufacturers make GSM and GPRS phones with multiple cell phone bands so that they can work in multiple countries. Most cell phones work on two, three or even four bands. Quad band phones are the most flexible as they can be used all over the world and are often called international phones as a result.

How are multiple band phones defined and where will they work? Multiple band phones are usually defined by how many GSM frequencies they can operate on and usually come in four different categories, dual band, tri band and quad band. If thinking about how to start a cell phone business it is important to remember the different type of bands as it could mean the difference between your customer getting a high performance phone that they're happy with and can and them getting a shiny and costly paperweight.

Dual band phone works with two GSM frequencies and, depending on where the phone is made will probably work for the frequencies 900MHz and 1800MHz. These phones are usually less expensive than other types of cell phone and it can be a good way to get a cheap cell phone that will still send SMS MMS and act as a WAP cell phone.

The tri band phone runs on three frequencies and can be used in most countries. This unlocked GSM cell phone is a cheaper option than the quad band phone but safer than a dual band phone.

Quad band phones, or international phones as they are sometimes called, use four bands and can be used anywhere in the world. If you are looking to start a mobile phone business and you wonder what is an unlocked phone guaranteed to sell well and give you the least trouble with customers it will probably be this type of cellphone.

What Are The GSM Frequencies? Almost all of the world works on the frequencies 850Mhz, 900MHz, 1800MHz, 1900Mhz and in some rare circumstances 400MHz although there are some other frequencies in other locations.

Thankfully too areas where each frequencies work is fairly easy to define in the very general sense (although it always pays to check). So when you're looking for what areas a cellular phone will work in you should be able to follow a rough guide.

So which areas use GSM 900 and 1800 MHZ signals and which areas use the GSM 850Mhz and 1900MHz frequencies can usually be broken into two groups.

If you are traveling in with your cell phone in Oceania, Africa, Europe, Asia (except for Japan and Korea), the Middle East, Brazil and the Baltic region and looking for roaming networks then mobile network coverage will be either 900MHz, 1800MHz or 900MHz and 1800MHz.

If you are looking for a GSM world phone that will work in the US or South America then you're better sticking with a wireless cell phone that'll work on the 850Mhz and 1900MHz bands.

Will different frequencies work in different areas? With the majority of the GSM world being broken into two main groups (those that take Most of the GSM world is roughly broken up into four main frequencies 900MHz and/or 1800MHz and 850Mhz and/or 1900MHz most unlocked GSM phones will work on one, two or three of the GSM frequencies around the world giving you some level of international roaming on an unlocked phone.

However, you possibly won't get any joy if for example you take a dual band phone designed for Europe and Asia and then try to use that bluetooth phone in the US.

How can I check if a phone will work in a particular area? There are two ways to check if a phone will work in a particular area; the first is to get the phone band, which can usually be found on the product description.

If you're working through how to start a cell phone business and considering phones to stock, it doesn't matter if you're thinking about a multimedia mobile, WAP phone or GSM watch phone, the process should be the same. If you are sourcing cell phones from a wholesale supplier or wholesale dropship vendor put the ball into their court. They should have that information on their website or product advertising material for the unlocked cell phone.

Once you've got the GSM frequency the GSM phone worked on you can make sure it will work in your area.

If you are looking for a cellphone for yourself this could be as easy as calling your local service provider, or looking it up on sites like GSMworld dot com or worldtimezones dot com.

If you are wondering how to start a cell phone business then your best course of action is to list the frequencies on the description for the GSM cell phone, along with the phone's other features (like if it is a music phone or it has a good cell phone camera) and tell the person who wants to buy unlocked cell phones from you which parts of the world it will probably work in.

So it looks like cell phone bands and GSM frequencies aren't that scary after. It's just a case of knowing where to look and ensuring you've got the right phone for the right location.

Learn more about cell phone bands and the other great hints on how to start a cell phone business at Chinavasion. Your best source of international cell phones and unlocked cell phones online today.

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Mobile Phone Spy Software Apps - Where To Download A Cell Phone Spying Program For Under $70

Mobile phone spying apps are programs which are installed on the following type of people's cell phones:


People you're in a relationship with you think may be cheating on you or lying to you
Your son or daughter's cell phone to keep track of who they are talking to and where they are going obviously for their own safety as a concerned parent
If you are an employer and you want to keep track of your employees to make sure they are doing what they are supposed to be doing and going where they are supposed to be going

Mobile phone spying apps are a fairly new invention and the download and sales of these apps has increased significantly in just the past year or two. Probably the most popular use of mobile phone spying software apps is to find out if lovers are cheating on each other. This correlates with the fact that there is infidelity involved in close to 50% of relationships out there including marriages.?

Although there are a lot of signs of infidelity occurring in relationships such as:


Your spouse or boyfriend or girlfriend being less affectionate
Your spouse or boyfriend or girlfriend being away more
Your lover dressing differently or wearing different cologne or perfume

In fact there is actually a book out there called 180 different signs your lover is cheating on you. But the problem with all these different signs for figuring out if someone is cheating on you or not do nothing but increase suspicion and very few if any of them provide actual cold hard proof of cheating.

That is why cell phone spying software programs are becoming so popular. They provide you with undeniable proof and they do so in quick fashion. Cell phone spying programs provide you with complete unrestricted access to the most sensitive information on your potential cheating partner cell phone such as:


Every phone call made or received which includes the time and the length of the phone call as well as the actual phone number
Text or SMS messages including the time and the exact text message as well as the phone number involved
Full unrestricted access to the target cell phones phonebook
Without a doubt the most powerful feature of these mobile phone spying programs is its GPS tracking capabilities. Logging on to the mobile phone spying members area you click the 'GPS tracking tab' and the person's exact location (accurate within about 200 yards) is updated on a map with their position shown to you in real-time. The obvious advantage to this feature is you get to be a fly on the wall and see exactly where you're cheating partner goes and when they go there.

The bottom line is these phone spy programs provide you with undeniable proof of a person's lying and infidelity.

The cost of mobile phone spying programs

There are about five popular and effective cell phone spying programs you can use. Their features, options, and prices vary widely. As a general rule when it comes to these spy programs the old phrase you get what you pay for definitely applies.

The least expensive phone spy software is only $49 for a full year's access but the information that is provided to you in the members area seriously lacks important details. For example the text message panel in the members area of this particular phone spying application shows you the time the text message was sent or received but it doesn't show you the text message.

The most expensive phone spy software will provide you with the features outlined above as well as a spy bug feature which turns the person's cell phone into a microphone to you can listen in on everything going on within 20 or 30 feet of the cell phone and a feature called remote call listening. This feature notifies your cell phone with a text message when the cell phone of the person you think maybe cheating on you makes or receives a phone call ?You dial that person's phone number when you get this text message and you are patched in to that phone call. You can hear both sides of the entire phone conversation with neither of them knowing you are there. In order to get access to the remote call listening feature and the spy bug feature you have to be a member of their Plus-X plan which costs $349 for a year membership. To me this is a little bit excessive. I mean the remote call listening and the spy bug feature are pretty cool tools but if your goal is to find out if your spouse or lover is cheating on you it's not necessary.

The best mobile phones spying programs generally cost between $60 and $80, include lots of features, have the best satisfaction guarantees, work on almost all models and types of smart phones, and provide you with tons of information in the members area, more information than you could ever possibly want or need.

Which types of cell phones these cell phone spy applications work on

Again this varies depending upon which cell phone spy application you choose. The least expensive one described above all their features only work on Androids and some Blackberry models. A couple of the best phone spy programs works on pretty much any smart phone which includes most all models of Blackberry, Symbian, Android, IPhone, and Windows Mobile and costs right around $60 to $80.

What type of guarantees of satisfaction come with these phone spying applications?

Ironically the most expensive one only has a 10 day guarantee of satisfaction. My personal opinion if you're spending $250-$350 for anything it should come with more than a 10 day guarantee. Most of the other phone spy tools come with a 60 day guarantee of satisfaction.

Is there any way the person whose phone is being spied on can ever know or find out it is being spied on?

Absolutely not. The only possible way someone could know or have a good idea that this application is installed on their cell phone is first off it have to be pretty tech savvy and they have to know what they are looking for. For example one of the signs this kind of program is installed on your cell phone is your battery loses its strength a little bit quicker but it's barely noticeable. The only other way the person could know is if they go through the list of applications on their cell phone but these mobile spying applications use names that make it difficult for you to figure out what it is and most people would just think it's a platform specific software program that is a necessity for the phone to run properly, for example the name of the application that is the phone spying program would look something like this - mob83483_app. So the bottom line is the only type of people who could ever possibly know there is a mobile spy software program on their phone as if they were experts in these type of applications.

Do I need to actually get physical access to the phone I want to install the spy application on?

Yes. I see some advertisements and false information on the Internet that indicate you can install some of these programs remotely but that is absolutely impossible. You don't need access to the phone for long though these applications can be installed in five minutes or less. So when your girlfriend or boyfriend or spouse is in the shower that is the perfect time to install it.

What is the general process for installing a spy application?

The actual install process is fairly simple.? Whichever cell phone spy program you decide to become a member of they will give you a website address to visit to download the program. ?When you get access to the person's phone go to that web address with a web browser that will be built into their phone. The program will download which takes about a minute or a minute and a half. The total file size is fairly small so it won't take long. At that point the phone will ask for your permission to install the program - you select yes. The actual install will take another minute to a minute and a half. At that point you shut off and then restart the phone and the program will be running invisibly. Whichever phone spying program you decide to become a member of there will be detailed instructions for installing their program for each type of phone. You can print out these instructions and take them with you.

How mobile phones spying programs work

All of these programs operate the same way. Every time a cell phone does anything (makes a call, receives a call, etc) it triggers a programming event. A programming event is nothing more than a place a person who writes or creates cell phone applications can insert programming code. These mobile phone snooping applications merely send information about these events to a web server. The particular events we are talking about are events that occur every time a phone call is placed or received, a text message is sent or received, etc. The Web server the information about these events is sent to is the members area of your phone spying program. All of these spying applications allow you to logon to the Web server 24 hours a day seven days a week to view the information about the target cell phone, in this instance the cell phone of the man or woman you think may be cheating on you.

Are there any monthly fees involved with mobile phone spy software?

Some of these programs have monthly fees a few of the good ones do not.

Are there any free cell phone spying programs that work?

Is possible you can get one free but it is highly unlikely. Not that the software itself is very complicated it is certainly feasible that the software alone might be free however the main ingredient to make it work is the web server. In order to view this information it has to be sent to some sort of web server and nobody is going to provide this for free. If you see someone claiming to offer this free it is some sort of cell phone spy scam.

Are these phone spy programs legal?

Yes and no. You see when you become a member there is a disclaimer you have to agree to. That disclaimer basically states that the persons whose phone you are installing the spy application to is aware that you are installing it and they agree to it. This is obviously a ridiculous disclaimer because if the person with the target phone is aware that the application is installed you are not going to be able to catch them doing anything like talking to the person they are cheating with or texting them. As long as you agree to that disclaimer (it involves checking a check box when you sign up) then they will allow you to become a member.

The most popular and one of the most effective phone spying programs is cell-phone spybubble Which costs a one time payment of $59 which gives you a lifetime membership and the ability to spy on an unlimited number of phones. There are two other great, under $70, phone spying programs. To learn about these programs and you all the features and options all these cellphone spying programs have visit the mobile telephone spy website.

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