It is a competitor to the CDMA protocol and is also considered by many as a protocol that is superior to CDMA because of its features. This protocol is a part of emerging wireless mobile telecommunications technologies, such as Enhanced Data rate for GSM Evolution (EDGE), High-Speed Circuit-Switched Data (HSCSD), and Universal Mobile Telecommunications Service (UMTS). It has more than one billion users worldwide and is currently used in more than 212 countries.
There is a difference between GSM and its predecessors. Both its signal and speech channels are in digital form and in this context it falls under the category of 2G mobile phone system.
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GSM (Global System for Mobile Communication) is the most widely used wireless mobile communication technology in the world. GSM cell phones are highly popular in Asia, Europe and Australia due to its excellent coverage and flexibility, as against to CDMA (Code Division Multiple Access).
What is a GSM Cell Phone SIM Card?
Unlike CDMA technology, the GSM phones utilize SIM (Subscriber Information Module) cards. Simply put, a SIM card is a just like any other smart card, such as a credit card. It contains information about user's service subscription and account settings. It allows the cell phone to access the service network through wireless technology. A SIM card also stores essential data such as user's subscription numbers, phone number, security codes and personal contacts. The most important benefit of using a SIM card-based cell phone service provider is that the card can be used in different phone devices. Thus, you can retain the same number while sporting new cell phone devices.
What are Unlocked GSM Cell Phones?
Unlocked GSM phones are devices that can be used with the GSM SIM cards from different service providers. Thus, if you are planning to shift to a new mobile service provider (such as AT&T, T-Mobile and Cellular One), you are not required to dump your phone. Every time a new SIM card is inserted into the GSM phone device, it starts receiving network connection from the new carrier.
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It was joy unlimited when two of Nigeria's major GSM operators announced their presence in August 2001.The operators were granted licenses to commence operation to revitalize the economy. MTN and Econet now Zain became the major players as the Nigeria 's premier GSM operators. People heave a sigh of relief that the sector that had since being dominated or monopolized by The National Telecommunication (NITEL) system has finally being broken.
Econet was first to commence operations in August 2001, that development made Nigeria one of the First few countries on the continent to join the fast changing telecommunication elites at the time. In the later part of that same year, MTN also commences operation paving way for competition. Having a mobile phone back in those days was like having a private jet, it was indeed a luxury. The obnoxious cost of mobile phones and the Network lines made robbers or mobile phone snatchers to be on the prowl. The ostentatious display of handsets by the haves was enough to send a poor man to his early grave out of frustrations.
A minute call was as high as 50naira, a network line was also as high as 30,000naira and the handset was 20,000naira which is about 35 US cents, $200 and $135 respectively. repetidores gsm
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