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by refurb 2016 days ago
Related to that, I can remember borrowing a friend Motorola cell phone in the early 90's, probably the 9800 model, still unencrypted analogue transmission.

Anyways, you could enter the service menu and select which tower frequency you'd like to receive or send on. I remember playing with it and selecting the same channel to send/receive and there was already an on-going call. I heard one of the people say "did you hear that?" and I pulled the battery, it freaked me out.