Here are some basic usage examples of the nrfutil 91 modem-firmware-upgrade command:
-
Do a modem firmware upgrade of a device of the nRF91 Series with the serial number
1050993570:nrfutil 91 modem-firmware-upgrade --firmware mfw_nrf91x1_2.0.1.zip --serial-number 1050993570 -
Do a modem firmware upgrade of all devices of the nRF91 Series that are connected to your computer:
nrfutil 91 modem-firmware-upgrade --firmware mfw_nrf91x1_2.0.1.zip --all-jlinks