Ideally, your phone should support all four bands. In the real world, not everyone is going to have a quad band phone, so here are some guidelines:

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.