CONNECTING THE WORLD
Nov 12, 2021
2 minutes
COMPILED BY RICHARD VAN RENSBURG
THANKS to cellphones, we can talk to almost anyone anywhere on earth these days, from anywhere where there’s a signal. In a certain sense, cellphones are like very sophisticated two-way radios – those devices previous generations used to call “walkie-talkies”. Cellphones also use radio waves and there’s a transmitter and receiver for signals, whether voice or data. But a cellphone alone can’t send
You’re reading a preview, subscribe to read more.
Start your free 30 days