If the gateway is operating with a SIM Card, then you don’t need an ethernet cable. You can skip the 1st, 2nd, and 3rd steps.
You always have to establish the first connection with an ethernet cable.
To start the connection process, plug the ethernet cable into the gateway on the top left side of your device.
Then, plug the other end of the ethernet cable into your Wi-Fi router.
Plug the power cable within the box into the gateway on the bottom left side of your device.
Plug the other end of the power cable into a power outlet.
a) Once plugged in, the gateway will flash red with all three lights.
b) After the red lights, only one LED will start flashing green and red. This means the gateway is working well and searching for a connection.
c) Afterwards, this LED will be fixed on the green, and the 2nd LED will start flashing green. This means that the gateway is trying to establish the connection.
d) After some time, 2nd led will also be fixed on the green. This means the connection is successful, and it’s ready to use.