How did 4G start?

The world’s first publicly available LTE service was opened in the two Scandinavian capitals, Stockholm (Ericsson and Nokia Siemens Networks systems) and Oslo (a Huawei system) on December 14, 2009, and branded 4G. The user terminals were manufactured by Samsung.

4G was first deployed in Stockholm, Sweden and Oslo, Norway in 2009 as the Long Term Evolution (LTE) 4G standard. It was subsequently introduced throughout the world and made high-quality video streaming a reality for millions of consumers.27 May 2021

The main difference between these two mobile telephone generations is that in 1G systems the audio was encoded as analog radio signals (though call set-up and other network communications were digital), while 2G networks were entirely digital .

In a nutshell, because 5G uses a different spectrum than 4G LTE, it can deliver stronger and faster connections, higher capacity for traffic, as well as latency as low as 1ms .