Conversation so far:
when did cell phones first hit the market
First automatic analog cellular systems deployed were NTT's system first used in Tokyo in 1979, later spreading to the whole of Japan, and NMT in the Nordic countries in 1981.
when did the first cell phones sell in the united states
The first analog cellular system widely deployed in North America was the Advanced Mobile Phone System. It was commercially introduced in the Americas in 13 October 1983.
was the advanced mobile phone system innovative
AMPS was a pioneering technology that helped drive mass market usage of cellular technology, but it had several serious issues by modern standards.

Question: what issues did the phone system have
Self-contained rewrite: what issues did the advanced mobile phone system have