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Who is credited for inventing the first telephone exchange ?

Alexander Graham Bell
Antonio Meucci
Thomas Edison
Tivadar Puskas

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Tivadar Puskás was working for Thomas Edison when he build the first telephone exchange in 1877. The very first experimental telephone exchange was built by the Bell Telephone Company in Boston in 1877 and the very first commercial telephone exchange opened in Friedrichsberg close to Berlin on November 12 1877.

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The Digital signal 1 is also known as

D1
S1
T1
M1

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It is a T-carrier signaling scheme devised by Bell Labs.

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In which year, the world's first GSM phone call was made ?

1974
1983
1988
1991

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On March 27, 1991 on Radiolinja's network, the world's first GSM phone call was made.  Radiolinja' was a Finnish GSM operator and now is a part of Elisa Oyj.

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3G is

International Mobile Telecommunications-1998, family of standards
International Mobile Telecommunications-1999, family of standards
International Mobile Telecommunications-2000, family of standards
International Mobile Telecommunications-2001, family of standards

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The first commerciall cellular network (2 G) was launched in which country ?

Finland
USA
Denmark
Japan

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It was launched by Radiolinja in 1991 in Finland.

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The first commercial mobile payments system was launched in which country ?

Finland
Philippines
Denmark
Japan

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It was launched in 1999.

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Which is the world's largest manufacturer of mobile phones ?

Nokia
Samsung
LG Electronics
RIM

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It shipped 116.3 millions units in the 3rd quarter of 2013. It is the 26% of whole mobile market share by OEM. Nokia is on second sport with  13%.

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In which year, the first Blackberry smartphone was launched ?

1998
2002
2004
2006

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That smartphone supported push e-mail, mobile telephone, text messaging, Internet faxing, Web browsing and other wireless information services

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The collection of application developed by third parties for iPhone are distributed from a centralized location. What is that ?

App Store
App World
App Location
App Shop

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Nexus One is the smartphone by

Nexus_One.jpg
Nokia
Microsoft
Google
Apple

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It is manufactured by Taiwan's HTC Corporation and uses the Android open source mobile operating system

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