No brainer …..

…. The bestest ever invention, ever. .

“ A man talks on his mobile phone while standing near a conventional telephone box, which stands empty. Enabling technology for mobile phones was first developed in the 1940s but it was not until the mid 1980s that they became widely available. By 2011, it was estimated in Britain that more calls were made using mobile phones than wired devices” (Wikipedia)

“The first handheld mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola in 1973, using a handset weighing c. 2 kilograms (4.4 lbs)” (Wikipedia)