It has transformed and redefined the way we communicate.
From being christened as "Brick" given its size, the cellphone (or mobile phone) celebrated a quiet 40th birthday on 03 April, 2013.
The first hand-held mobile phone was demonstrated by John F Mitchell and Dr Martin Cooper of Motorola in 1973, using a handset weighing around 2.2 pounds, around 1 kilogram.
Image: Martin Cooper holds a Motorola DynaTAC, a 1973 prototype of the first handheld cellular telephone in this 2003 file photo.
Text: Puneet Wadhwa, Business Standard