What is main problem of 1G?

So 1G uses this FDM technology. So cellular concept, analog FM and FDMA are the three key technologies of 1G. Please remember, the cellular structure is the most important concept of the wireless cellular communication system.

Even after being the first wireless telecommunication technology, 1G technology wasn’t fully digital . Data transmissions were done in analog form at 150 Mhz and above frequency of radio waves. This was the biggest drawback of 1G technology. This led to insecurity of phone calls.6 Mar 2019

1G refers to the first generation of wireless cellular technology (mobile telecommunications). These are the analog telecommunications standards that were introduced in the 1980s and continued until being replaced by 2G digital telecommunications.

Key features (technology) of 1G system