How many communication satellites do we need?

Satellites are the mainstay of communication around the world, whether for voice calls, short message service, Internet and live television programmes of events at another faraway locale in the world. However, with the advent of dense networks of fibre optic cables linking different parts of the world together, the relevance of satellites for facilitating transfer … More How many communication satellites do we need?

Does the voice call and short message service functions of a smartphone needs protection by an antivirus program?

Smartphone is the de facto standard in mobile telecommunications, and with open source operating systems such as Android, the price of previously expensive smartphones has fallen drastically. This enables significant market penetration of smartphone, which draws users away from conventional voice call and messaging only feature phones. With useful features such as mobile Internet, better … More Does the voice call and short message service functions of a smartphone needs protection by an antivirus program?