Is the build in LTE Modem only for backup use or
can i put it along with the other WAN connections?
So I can put it in the highest priority?
Sometimes CableWan is slow and LTE is fast.
Why does it have to SIM-Slots?
Can I use two different SIM Cards on equal duty?
So I have two times LTE?
The LTE connection can be put with the other WAN connections, it is treated just like a normal WAN connection.
There is a redundant SIM slot in case the first SIM fails, or you can set a data cap such that it will automatically switch to SIM2 when the threshold is reached. There is only one LTE modem though, so you cannot get 2x LTE.