the heat is really low compared with cell phone jammer | cell phone ...

Phone the course of development can be divided into the era of analog phones, the GSM era era and the era of 3G, 2.5G, 2.5G and 3G, represents the development trend of China?s mobile phone. Analog mobile phone belonging to the first generation of mobile communication technology. Where the number ?9? at the beginning of the phone are of the analog network. The ups and downs of the analog cellular phone signal simulation of human speech sounds transmitted through the airwaves, so this means of communication known as the ?simulation mode?. Analog mobile phone system is analog and frequency division multiple access (FDMA) technology, the first generation of mobile communication technology. Analog mobile communications and digital mobile communication confidentiality of the poor can easily be and machine Daoda the. The paste component is the advanced technology adopted for this kind of? ?cell phone jammer ?? .
The only voice services can not provide a variety of value-added services; network coverage range of small and poor roaming capabilities; bulky analog cell phones, weight heavy, antiquated style, coupled with mobile phone supplier has already stopped the production of analog phones or analog phones repair and Update are severely constrained. China Mobile Communications Corporation to close the analog mobile phone network after 31 December 2001 to cease operating the analog mobile phone business. Motorola is first to enter the Chinese mobile phone market, it had a monopoly to the absolute advantage of China?s mobile phone market. In the era of analog phones, mobile phone most of Motorola products. Motorola 3200: The Motorola 3200 is the earliest mobile phones. For this kind of ? cell phone jammers? ? utilizes the advanced paste component and integrated circuit.
Motorola 8900: the first Uncovery phone, commonly known as ?bricks and mortar?. Mobile communications in the late 1980s began to enter the Chinese market the first generation of mobile phone upstart known as ?Big Brother?, the highest price has reached 3 to 4 million. As with a flip on the pocket will not because they do not accidentally touch a key to boot a signal. Later, Motorola launched in the early 1990s, the 8900 successor 9900, because of its small size, lightweight and durable, was a white-collar women?s pet. But it is the same as 8900-type, nickel-chromium batteries, power is too small. 9900 in 1995, has been leading the mobile phone fashion, the highest price was up to 2 million. In the locations where the using of the cell phone is needed to be forbidden and the cell phone signal is needed to be shielded, ? phone jammer?? is needed.
GSM technology now widely used in China narrowband time division multiple access (TDMA). GSM digital network with a strong confidentiality and anti-interference, clear sound and stable, talk and have large capacity, high-frequency resource utilization, open interface, powerful advantages. GSM era, no longer just a Motorola, a lone world, the major mobile phone manufacturers optimistic about this new opportunity, eager to expand in this market share. Nokia, Ericsson and other manufacturers to come from behind, and Motorola said the three overlord. Ericsson GH337: This is the first GSM phone to enter the Chinese mainland, in the era of the analog network, GH337 can be described as a GSM mobile phone is the first in mainland China. This kind of? cell phone jammer? will only act on the communication of the cell phone instead of other electronic devices.
GSM network in Guangdong Province, just opened, GH337 as a digital mobile phone, its performance in all aspects than the analog phones are much better, prompting everyone competing to buy. Ericsson GH398: Ericsson GH398, was launched in 1995 in this introduction it is not because it is ?handsome,? but because it is the first mobile phone ring tones, but when the GSM phone is a senior consumer goods music ringtones, mobile phone jammer ? users to avoid people misunderstanding the toy phone. But precisely because the lead of Ericsson, will have a 1999 cell phone ring tones shine. The Hanno good CH9771: This is the domestic emergence of the first antenna-free phone, it uses a mechanical control and in line with ergonomic S-shaped design. For example, if the student is not allow to use the cell phone during class for it will influence teaching process and other students,? ?cellphone jammer ?? can be used to prevent the phenomenon.

Source: http://www.mobile-cellphonejammer.com/the-heat-is-really-low-compared-with-cell-phone-jammer/

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