
The first mobile phone invented by Martin Cooper weighed a kilogram and cost $1m to produce.
“The battery lifetime was 20 minutes, but that wasn’t really a big problem because you couldn’t hold that phone up for that long.”

The first mobile phone invented by Martin Cooper weighed a kilogram and cost $1m to produce.
“The battery lifetime was 20 minutes, but that wasn’t really a big problem because you couldn’t hold that phone up for that long.”