Q:
Which port on any Arduino board should be connected to the Key Port on the Adafruit FONA 3G+GPS Breakout?
Answer & Explanation
Answer: C) Gnd
Explanation: The Adafruit FONA 3G+GPS Breakout’s Key pin should be always connected to the Gnd Pin on any Arduino Board. This pin provides the function of the power on/off indicator. When you would like to shutdown the board, connect the pin to the Gnd of the Arduino Board for about 3 to 5 seconds. However for prolonged use usage of the Adafruit FONA 3G+GPS Breakout one needs to permanently connect this pin to the Gnd of the Arduino.
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