"Sika kɔkɔɔ tumi nyinaa!"
Accra Night Market to Asanti Gold Mine, 0 phone bill communication 30 kilometres
6-day over-long standby, rainstorm power outage, normal use
The noise-cancelling microphone penetrates the shouting sound of Kumasi Market,
30 kilometres in a straight line, 20 metres underground in the gold mine,
and English/French/Hausa three-button switching
