Subscribe to the BlogEveryone’s talking about unlocked cell phones, but no one is taking the time to explain exactly what it means. Here are a few basic points about the subject:Why should you unlock mobile phones?In general, there are two main types of cell phones, GSM and CDMA, each compatible to different frequency ranges. When GSM compatible phones [...]
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The Cell Phone Mysteries, What are Dual Band, Tri Band and Quad Band Cell Phones and Where Will They Work?
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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 [...]
Cell Phones: To Commit or Not to Commit?
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Before we begin I feel that it is important to explain that only some kinds of phones can be unlocked. Specifically phones that are compatible with the GSM (Global System for Mobile Communications) network and have SIM Cards. GSM phones contain a small, removable card, known as a SIM (Subscriber Identity Module). This SIM Card [...]