Fibocom MG661-EU - Pin Details

2 Pin Definition
11
The distribution of pins is shown in the following figure.
Figure 2. Pin distribution
⚫ Keep the NC pin unconnected.
⚫ Connect all GND pins to the ground network.
⚫ The functions of reserved pins 4, 5, 6, 8, 26, 44, 96, 99, 102, 104, 105
and 106 in the figure have been debugged OK. For details, see the
next section.