Hello, I want to know how to configure all the sim card slots of my LtAP LTE device kit, it has three sim card slots.
I only have active a one slot, that it is the second slot.
It doesn't let me activate the other two slots, it tells me that "only APN can be local!" And I do not understand because.
You have working Slot 2. OK.
To enable slot 3 you need to change the port using Terminal. This means that you can use Slot 2 OR Slot 3, not both at same time.
To enable slot 1 you need a second LTE miniPCIe interface and change the power output from USB to miniPCIe slot also using Terminal.
You saw the block diagram of this device to understand how it works?
More info about the commands on Terminal and Block Diagram
here.
About APN profile, you can add how many you want, but you can set only one per interface!
Regards.