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Facts About Unlocking GSM Mobile Phones

If you have just learned that your GSM mobile phone is locked, you might be wondering what on earth that means and possibly asking yourself how you can “unlock” it. The short answer is that some wireless providers do lock their phones, meaning that they can only work with memory cards, or SIMs, issued by them. You might like the phone itself, but not the provider and in this case you will need to know how to unlock your phone before you can switch to another service. Whilst a traditional cell phone service works by sending calls to a phone, which retains its own unique serial number, a GSM mobile phone is very different. This phone uses a removable memory card or account card which is also known as a SIM card where SIM stands for “subscriber information module”. It...
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VOIP Cellular Services: An Era Of Global Mobiles

Voice over IP (VoIP) provides better service because it has greater bandwidth efficiency that allows for a higher quality of voice and data transmission. Rather than the traditional public switched telephone network used with land line phones, VoIP transmits voice, voice messaging, facsimile and other communication services via the Internet. Moving to the next phase in cost effective VOIP cell phone calling plans – Unlike traditional copper wire phone systems that use an analog voice signal, Internet Protocol (IP) converts analog to a clearer, faster, digital format. Digital provides better quality and service and, because its signal can be compressed, it can perform a great many more communication functions. Because voice over IP uses one infrastructure for both voice and data, it c...
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History of Cell Phones

A lot of professionals today can’t leave their homes without their cell phones. The cell phone is no longer a luxury nowadays; it is already a necessity so that an individual can be reached at any time of the day or night. Do you know the history of cell phones? The cell phone only came into existence in the late part of the seventies. Illinois Bell was the one who tested the first cell phone in Chicago, Illinois. The test was successful however, it was only in the mid-eighties when service carriers started their operations. The frequency band used back then was 800-900 MHz. Several years ago, the cell phones were still bulky units. Radio signals of the service carriers often interrupt or interfere with that of commercial radios. Before, cell phone service was costly and unreliable due t...
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