Gsm Phones

Written by Stephanie Dula
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GSM phones with the capability to work all over the world can be purchased using a variety of means. One common way to buy a GSM phone is through a network service provider. These phones usually come at a discounted rate in exchange for a one- or two-year contract. They come with an encoded Subscriber Information Module (SIM) card that will "lock" the phone's usage into that specific network.

These locked-in phones will not be able to work outside the service provider's network, and may be useless in other countries. Unlocked, SIM-free phones can be purchased with no need to enter into a contract with a service provider. Separate SIM cards must be purchased for these phones, and they are available in country-specific, prepaid formats.

GSM Networks

GSM phones support some combination of four different bandwidths: 850, 900, 1800, and 1900 MHz. Quad-band phones with compatibility for all four bandwidths obviously provide the most comprehensive global coverage. Information regarding a phone's ability to operate in specific bandwidths is available in online specifications of the particular model on retailers' websites. Specific bandwidth support in world regions can typically also be found here.

Since GSM phones come equipped with a host of high-tech features that may require some practice to effectively utilize, it's important to carefully compare similarly priced phones before purchase. Features can vary according to the target audience along lines of design, connectivity, and applications. Finding the right GSM phone is possible with a little research on the features of highest priority for the user.


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