Could you work without a smartphone?

[ipf]

But did that result in a free call? The pulses were exactly the same as if you used a dial phone, so I never bought into the free call idea - remember this was a common rumour prior to the introduction of itemised billing, so how could anyone be certain unless making all calls this way and not being charged for a single call?

I can't remember it FROM phone box because once the line was broken you had to press the 'A' button and wait for the coins to drop but you could to call back phone booth from landline....don't think it was free, though.