[forinti]

In the 1980s a friend of mine had a German radio which had a larger array of frequencies than that available in my country. It allowed us to listen to the police. Curious, but not interesting.

In the 90s my brother had a portable TV/Radio which we managed to tune into cellphone conversations.

Those were the days you could still telnet 25 to send emails with whatever sender you wanted. I used to send Christmas greetings from Santa to my colleagues at uni.