What is Error Code: 3, received during Laird’s MG100’s startup, indicative of?

Answer

[00:00:04.699,249] modem_hl7800: Error code: 3

[00:00:04.699,340] modem_hl7800: AT+GNSSSTOP result: -5

Those are expected errors. It’s trying to turn off the GPS even though its already off. There is nothing to worry about.