how does GSM work? 2003-05-01 03:52:33 always when a new cell phone comes out the manufactors say that the speech quality has im improved alot compared to model before. and thats actually true when i compare my current cellphone with some nokia 2110 i had many years ago. but i wonder how it works. i guess the cellphone itself is the "encoder" and the other cellphone is the "decoder" at least this would make sense as you would save bandwith this way. if i have a new cellphone with the newest hightech gsm encoder version xx.x and send this encoded data to a old cellphone, how does this old cellphone decode it ? or is the gsm codec frozen for i'd say more than 10years now? i can't imagine that it's just microphone technology that improved the speech quality so much last years.how does gsm work?