I noticed that
MBIM is mentioned in
Is it really possible to switch this modem from ECM to MBIM?
There is also
nat setting in this modem:
+QCFG: "nat",(0-1), the current state is
0, but my understanding that NAT is still in a place since the host gets 192.168.43.x address from the modem. Is it possible to avoid a NAT on the modem?