3G gateways should continue to work in areas with continued 2G coverage but most likely at reduced performance.

Setting up a new 3G unit

Upload and run FONA3G_setbaudAIT.ino.hex first on new units. This sketch sets the cellular modem's baud rate to 4800 and only needs to be run once. The microcontroller and modem will not communicate correctly if the hardware baud rate does not match what is set in the firmware.