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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.

Today, most cell phones support multiple bands as used in different countries. These are typically referred to as multi-band phones.

Here are three samples of quad band phones:

M002L (http://www.sourcinggate.com/m002l-quadband-cellphone-with-wifi-java-35-touchscreen-black-p-6245.html ) is a perfect handset that meets all people use. It is our strongly recommended mobile phone which was equipped with most of the practical functions or entertainment use software. M002L comes with piano-black body with whopping 3.5 inch high-sensitive touch screen, it has 3 pages menu including JAVA2.0, Opera, Voicemail, Network, and Contacts. The most important is that M002L supports Wi-Fi function for wireless internet viewing and analog TV function. Moreover, it has built-in G-sensor for changing the screen to landscape mode from portrait mode or playing G-sensor game.

KA09 (http://www.sourcinggate.com/cect-ka09-quadband-cellphone-with-24-touchscreen-white-p-4186.html ) is slim and compact cellphone comes with 2.4 inch high-resolution Touchscreen. Its size is the same as your palm, the perfect curves delivers cool handle. The concave-convex battery shell can anti-slide effectively. Three functional buttons lined a line below the screen; Power off/on button was placed on the top as well as a USB port. A stylus was tucked on the back.

KA09 has a compelling set of features. A 3.2MP camera was placed on the back for capturing pictures. Built-in G-sensor helps you change the screen to horizontal mode automatically. It also features stereo loudspeaker, WAP, TF card slot, FM radio, Dual SIM Dual Standby, Mp3/Mp4 player and Bluetooth.

Technology is changing our lives. 8310v (http://www.sourcinggate.com/8310v-dual-sim-dual-standby-analog-tv-quadband-works-p-5033.html ) adopts fashionable QWERTY keyboard, 35 keys were symmetrically placed under the functional buttons, pre-teens and young teens who mostly text and make phone calls should give this phone a look. Metal back shell delivers unusual handle, which along with protective sleeve can prevents your phone against being scratched. Analog TV function let you enjoy TV programs as you like. An 2.0MP camera was housed on the rear for shooting pictures. TF card slot and USB jack were on the two sides.

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.

Quad-band GSM phones are often referred to as “world phones” for their ability to work on any GSM network around the world. However, before these phones can use any SIM card inserted into them, they must first be unlocked. Depending on your contract, your current provider may give you a free unlock code. Otherwise, you may have to employ a paid online unlocking service.

And now let’s have a look at three common quad band phones:

The CCK13 (http://www.sourcinggate.com/cck13-dual-sim-quadband-cell-phone-with-bluetooth-red-p-6645.html ) comes with a very small cute appearance which makes it quite convenient and light to carry with. You can hold it in your palm or put it in your pocket. It adds very little weight to you. It has dual camera: 0.3MP front camera for self-capture and 1.3MP back camera, which let you fully enjoy the capturing of vivid photos and video clips. The 2.2 inch high vivid touch screen of QVGA resolution feeds back highly sensibly. So you can dial phones or send messages at the right time when you are in urgency without delay by the phone. Despite of its small size, it owns many powerful functions like any other large size phones own. Via its Bluetooth  set, you can share your favorite music with your friends as well as profiles transmitting; also, you can use the wired earphones with MIC and clip to enjoy your favorite music. The phone supports TF Card memory expanding up to 16GB in size, which means enough space to plant in files as you like. You can find the TF memory card slot behind the battery, next to the dual SIM slots. As a Dual SIM Dual Standby mobile phone, it ensures that you will be connected by someone others when you are speaking to some person through phone.

Though it is brick-shaped, the M009 (http://www.sourcinggate.com/m009-quad-band-tv-cell-phone-with-wifi-bluetooth-java-p-6633.html ) gives very comfortable hand feel when you handle it. The front panel of the phone is mostly occupied with a 3.0 inch high vivid touch screen of QVGA resolution, which provides perfect feedback when you press the icons and write messages. Right under the screen, there locates three keys: CALL/ANSWER key, ENTER key and END key from left to right. With dual cameras, you can take self-captures with the front camera and shoot photos with the back camera, besides which a LED light is located. Its 2.0M pixels of shooting effect ensure its high definition of photos. On the left side of the phone is a long volume rocker bar which could be used to control the volumes with UP to loud voice and DOWN to low voice, while on the upper top of the phone houses the mini USB port which is used for battery charging and linking to computers.

The Star C6000 (http://www.sourcinggate.com/star-c6000-quadband-wifi-bluetooth-analog-tv-cellphone-p-6269.html ) cellphone features a chic black finish with chrome highlights surrounding its sleek design and a bright 2.2-inch display that delivers the highest resolution available on this phone (480 x 320 resolutions) —presenting pictures, web pages and videos with incredible clarity. Designed to be efficient and convenient, the phone introduces 39-key backlit QWERTY keyboard for fast and precise typing.  A 3.5mm headphone jack at the right side enables you to enjoy the music with most common earphones. Moreover, this phone comes with multiple unique polyphonic ringtones, and it has vibrated and silent modes when you need to keep things quiet. You also can snap vivid photos as well as video clips using the HD megapixel camera on the back, which can snap photos as large as 2048*1536 pixels. The camera on the front is for self capture. Image editor enables you to make some simple but funny edition of the photos in your photo album.

In North America, GSM operates on the primary mobile communication bands-850 MHz and 1900 MHz. Initial implementations were exclusively 1900 MHz, with 850 MHz being added in 2001. In Canada, GSM-1900 is the primary band used in urban areas with 850 as a backup, and GSM-850 being the primary rural band. In the United States, regulatory requirements determine which area can use which band.

Like the Tri-Band phones, the Quad Band phones also offer different uses of bands. But unlike the Tri-Band phones, Quad Bands offer the use of an additional band, making four total bands available to the cell phone’s user. Quad Band phones are also known as “World band” phones, because the presence of the fourth band allows the phone to go essentially anywhere.

And now let’s have a look at three common quad band phones:

The most distinct feature of PinPhone 3GS (http://www.sourcinggate.com/pinphone-3gs-multitouch-capacitive-touchscreen-cellphone-wifi-white-p-6803.html ) is the multi-touch function on the capacitive Sharp touchscreen that makes it different from other mobile phones. It wows users with features such as the “pinch” the ability to move two of your fingers in or out to produce a “zoom in” or “zoom out” effect. The stunning large 3.5-inch HVGA touch display offers a high resolution of 480 x 320 pixels, making images leap out with stunning definition and clarity.

PinPhone 3GS also contains functions that usually exist in symbain smart phones. You can change the theme of this phone, which means to change all the icons of this phone. But, what’s pity is that it only has three different themes. Another important thing has to mention here is its copy, cute, and paste function. When tying SMS or Notes on the virtual keypad, you can copy, cute and paste words to make tying much quicker and easier. What’s more, PinPhone 3GS has a built-in DocViewer that enables you to view Word documents.

The W009 (http://www.sourcinggate.com/w009-gsm-dual-sim-wifi-mobile-phone-with-bluetooth-compass-p-6739.html ) comes with a 3.2 inch high vivid touch screen of QVGA resolution, which gives sensitive feed back when touched. On the top of the phone locates the standard 2.5mm audio output and the POWER ON/OFF key, which also could be used to lock the phone for protect. While the USB port houses on the bottom for charging and linking to computers. And on the rear locates the 1.3MP camera, which supports video-shoot with duration upon the storage. The card slots locate near the battery covered by the back shell. The whole phone gives quite soft and smooth hand feel.

Sciphone i99 3G (http://www.sourcinggate.com/sciphone-i99-3g-32-inch-hd-screen-quad-band-cell-phone-p-6688.html ) 3.2 Inch HD Screen Quad Band Cell Phone with Bluetooth Absolutely you will fall in love with this phone when you firstly see it. We can even find no suitable words to describe such great workmanship. Cute? Smooth? Soft? Delicate? Wonderful? Perfect? And excellent? All these words are not enough for this phone. This phone gives you so great visual and touching effect that you would not let it go once you hold it in your hands. The 3.2 inch high definition QVGA resolution flat touch screen will always satisfy you when you want to watch videos or take photos. Though only one camera on the rear, its 1.3 mega pixels will not let you down. A ringer bar locates on the left side of the phone, which works when you want to adjust the phone’s volume with up to loud voice and down to low voice. The END key is right below the touch screen, which also could be used to lock the phone. Those are all the things you can see from its appearance. Very simply design of its out looking, but so great workmanship.

If you’re only using your phone in the United States, and you get a dual band phone, make sure it has both 850 MHz and 1900 MHz. If you must get a single band phone, one with 1900 MHz only will give about the same amount of coverage.

Quad-band GSM phones are often referred to as “world phones” for their ability to work on any GSM network around the world. However, before these phones can use any SIM card inserted into them, they must first be unlocked. Depending on your contract, your current provider may give you a free unlock code. Otherwise, you may have to employ a paid online unlocking service.

And now let’s have a look at three common quad band phones:

The N97 (http://www.sourcinggate.com/star-n97-quad-band-dual-sim-wifi-mobile-phone-with-bluetooth-p-6810.html ) adopts the fashionable sideslip design. The front panel could be upheld by the back panel of the phone for about 45 degree, which makes it quite convenient when you are watching TV or videos as you can free your hands. The 3.2 inch high vivid touch screen is of WQVGA high resolution, which makes this phone quite suitable for TV and video watching. You will watch very clear TV and video pictures with this phone. On its left side houses a short slide switch below the ringer bar for locking and unlocking the phone. So you needn’t worry you will enter icons by unconscious pressing when you put it in your pocket or bag.

HIphone I98+ (http://www.sourcinggate.com/hiphone-i98-32-inch-3gs-worldwide-dual-sim-cell-phone-white-p-7061.html ) 3.2 Inch 3GS Worldwide Dual SIM Cell Phone is a worldwide cell phone which works under the four world standard GSM frequencies. Thus you never need to worry about it out of use. Dual SIM dual standby capability makes it capable of two SIM cards: a business SIM card and a private SIM card. You can pick every call from your friends, family or your workmates. Off-line state will never come to you.

The Star C9000 (http://www.sourcinggate.com/star-c9000-dual-sim-worldwide-wifi-phone-with-bluetooth-tv-p-6860.html ) comes with a stunning and compact 2.8 inch high vivid touch screen of WQVGA resolution. This is a worldwide mobile phone which can work under the four international standard GSM frequencies. Along with its two SIM slots, this phone is capable of two active phone numbers respectively for business and private affairs and it will not miss any business or private calls when driving, walking or even answering a call as it supports dual standby state.

There are many types and brands of quad band cell phones on the market. Phones ranging from basic cell phones to fully functional smartphones may use quad band technology.

Without getting into the technical details, a quad band phone is basically a phone that works in pretty much any country in the world. So, if you never plan on leaving the United States, a tri band phone is fine. In fact, a dual band phone – such as the Motorola Debut i856 would even pass muster. Here’s an explanation:

The four “bands” referred to in “quad band” are actually four different GSM cell phone frequencies. These are:

•    850 MHz

•    900 MHz

•    1800 MHz

•    1900 MHz

And now let’s have a look at three common quad band phones:

PinPhone 3GS (http://www.sourcinggate.com/pinphone-3gs-x6-multitouch-capacitive-cell-phone-4gb-p-7603.html ) is our strongly recommended touchscreen mobile phone from China, the PinPhone 3GS. As the title shows, the most distinct feature is the multi-touch function on the capacitive Sharp touchscreen that makes it different from other mobile phones. It wows users with features such as the “pinch” the ability to move two of your fingers in or out to produce a “zoom in” or “zoom out” effect. The stunning large 3.5-inch HVGA touch display offers a high resolution of 480 x 320 pixels, making images leap out with stunning definition and clarity.

When talking about iPhone, it is inevitable to talk about the phone body thickness. This Air Phone No.1 (http://www.sourcinggate.com/air-phone-no1-mobile-phone-air-thin-builtin-2gb-bluetooth-p-7468.html ) mobile phone just performs as well as iPhone. This mobile phone is ultra thin, only about 6mm thick. Putting it into your pocket or your bag, you can’t even feel its existence. The air thin phone body could match to that of iPhone. Plus, the smooth surface of the phone body produces quite comfortable hand feel. Light weight makes it truly convenient for carriage.

A large 3.6 inch high resolution touch screen takes over most of the front panel. The touch screen produces quite sensible response and accurate operation. On the back locates a 2.0Mp camera, which supports both photo-capturing and video-shooting, the duration upon storage. The SIM card slot houses right below the camera lens. For storage, this ultra thin mobile phone is built in 2GB plus internal 88MB, quite enough for phone storing.

Powerful WiFi global-use cell phone with 3.2 inch touchscreen and classic bar phone design! This is TianXin H168 (http://www.sourcinggate.com/tianxin-h168-quadband-wifi-cellphone-with-bluetooth-java-p-7458.html ) world phone which features (1) WiFi (2) Quad-band GSM connectivity (3) Two SIM card slots (Dual SIM with Dual Standby) (4) Rich featured SMS, MMS, EMS, and Voicemail messaging options (5) Reaches a new level of versatility with cellphone multimedia features.

(1) WiFi

Surf the internet wherever a hotspot or wireless connection is available (which is everywhere these days!) – Coffee shops, airports, libraries, restaurants, etc.

(2) Quad-band GSM Connectivity

TianXin H168 cell phone supports the four global standard GSM frequencies (850MHz, 900MHz, 1800MHz, 1900MHz) so you can trust it to work anywhere in the world.

(3) Two SIM card slots (Dual SIM with Dual Standby)

Having two SIM card slots with dual-standby, the TianXin H168 is perfect for people who want to keep two active phone numbers (personal and business) inside one smart phone. This is also a super convenient feature for anyone who travels between countries often.

(4) Rich featured SMS, MMS, EMS, and Voicemail messaging options

Text messaging and picture messaging is more than just a luxury these days, it really is a necessary function of any phone. When using the TianXin H168 you can use an onscreen keyboard to send a regular text SMS, picture or video MMS message, send and receive email via the phones POP3 integration (EMS), or even send and receive voice messages, the choice is yours!

(5) Multimedia (an almost endless array of choices)

Media to the extreme! MP3 Player, MP4 Player, Two Camera Lenses (front and back), EBook Reader, Accelerometer Motion Control, Games, Image Viewer, Photo Camera, Video Camera, Java, and Sound Recorder. If all those choices are not enough, then you can of course just surf the web to keep yourself entertained.

Quad band cell phones support four band 850/900/1800/1900MHz,so quadband cell phone can work in all the world.for different band contries,quad band cell phones are the best choice.

In the United States, only two frequency bands are used, 1900 MHz and 850 MHz. These are not the same bands used in Europe. A tri band phone or dual band phone receives only certain frequencies, which might not correspond to the frequencies in a specific area. The result is an increase in dropped calls and roaming charges that can be many times the rate for a normal call.

This Chang Jiang N97 is a compact mobile with a slide-out keyboard which is great for social networkers and texters. The QWERTY keyboard is perfect to write emails and send instant messages to your friends. The sensitive touch screen also allows you not to slide out your keyboard to send a message. Though it’s compact, the 2.8 inch high vivid screen is great for watching TV or videos, or pictures. The 2.0 Megapixel dual cameras with LED flash for night shots are good for capturing still photos and video clips, and you can upload them straight to your Facebook via Wi-Fi.

With the built-in TV antenna, this phone can receive very strong signals for TV and FM radio. In you leisure life, you can watch various exciting TV programs and listen to FM radio for the latest news, music, stories, etc. Along with many other multimedia like camera, video recorder, audio player, this phone will surely not let you down in fulfilling your work and leisure life.

Go online via Wi-Fi to download more media to enjoy, browse your favorite websites and update your Facebook status, surf the web and check your email. Besides, the Bluetooth allows you to share multimedia and the Java is useful for your games.

You can enhance its memory with a microSD card, up to 16GB, and store hundreds of music and videos to enjoy on the move. Enjoy your favorite music via the earphone or listen via a wireless Bluetooth headset. If you want to share hot music with your friends, there is also a loud-speaker. Due to the built-in accelerometer, it will be a very simple for you to switch the wallpaper, songs by shake your wrist, while the TV picture will auto rotate if open the keyboard.

More information about this topic can be found here: http://www.sourcinggate.com/chang-jiang-n97-quad-band-wifi-mobile-phone-with-tv-black-p-7887.html