Search results
Results from the WOW.Com Content Network
In addition, the standardization process focused on requirements more than technology (2 Mbit/s maximum data rate indoors, 384 kbit/s outdoors, for example). Inevitably, this led to many competing standards with different contenders pushing their own technologies, and the vision of a single unified worldwide standard looked far from reality.
The first handheld mobile phone was demonstrated by Martin Cooper of Motorola in New York City on 3 April 1973, using a handset weighing c. 2 kilograms (4.4 lbs). [2] In 1979, Nippon Telegraph and Telephone (NTT) launched the world's first cellular network in Japan. [3] In 1983, the DynaTAC 8000x was the first commercially available handheld ...
An old rotary dial telephone AT&T push button telephone made by Western Electric, model 2500 DMG black, 1980. A telephone, colloquially referred to as a phone, is a telecommunications device that enables two or more users to conduct a conversation when they are too far apart to be easily heard directly.
The Samsung C414 feature phone, an advanced feature phone. A feature phone (also spelled featurephone), brick phone, or dumbphone, [1] is a mobile phone that retains the form factor of earlier generations [when?] of mobile telephones, typically with press-button based inputs and a small non-touch display.
The iPhone, developed by Apple Inc., is a line of smartphones that combine a mobile phone, digital camera, personal computer, and music player into one device. Introduced by then-CEO Steve Jobs on January 9, 2007, the iPhone revolutionized the mobile phone industry with its multi-touch interface and lack of physical keyboard.
The Australian letter-to-number mapping was A=1, B=2, F=3, J=4, L=5, M=6, U=7, W=8, X=9, Y=0, so the phone number BX 3701 was in fact 29 3701. When Australia around 1960 changed to all-numeric telephone dials, a mnemonic to help people associate letters with numbers was the sentence, "All Big Fish Jump Like Mad Under Water eXcept Yabbies ."
One algorithm (used in GMR-1 phones) is a variant of the A5/2 algorithm used in GSM (used in common mobile phones), and both are vulnerable to cipher-text only attacks. The GMR-2 standard introduced a new encryption algorithm which the same research team also cryptanalysed successfully. Thus satellite phones need additional encrypting if used ...
The total number of mobile phone subscribers in the world was estimated at 2.14 billion in 2005. [20] The subscriber count reached 2.7 billion by end of 2006 according to Information [ citation needed ] , and 3.3 billion by November, 2007, [ 15 ] thus reaching an equivalent of over half the planet's population.