What is one 1G in telecom ?

1G was introduced in 1980s .  1G Technology or the brick was the  Full analog mode of communication. 1G technology  used  FDMA and used for communication  in one country .

It was  Continuous in amplitude and time . When try to do communication  for long distance Variations in the signal disrupts over long distances communication . It was Used in military communication .  AMPS Advanced Mobile Phone Systems introduced by bell labs USA in 1982.

What was issues when in 1G technology ?

Poor battery life :- Phone used 1G technology had very bad battery life and needed to charge it very frequently .

Poor voice quality :- Voice quality was not so good . frequent connection loss was the issue .

Phone size big:- size of phone was very big and it was not easy to take from one place to another place .

Weak security on air interface :- people in same frequency was able listen the communication . it was not encrypted .  

No roaming:- when try to roam from one place to another place call use to disconnect .

Frequent call drops:- Connection quality was not so good so there was no frequent call drops .

Limited capacity :- capacity was very less so not many people were able to do calls at same time

Poor handoff reliability:- because of very poor network handoff was not so easy .