I have one of these sticks but there are 2 problems, the first is it doesnt get recognized from the router but when it should work i would also have the problem with the double nat.
So the USB Modem uses the NAT ip and the RB2011 gets only a private adress. So there would be also a problem that i can access my servers behind the router.
tldr:
Is there any solution to get LTE with RB2011 working without double NAT?
Double NAT is a problem of the E3372, not the router. The device should offer a setting to disable
the built-in NAT but it doesn’t. There are directions on how to put different firmware making it a serial device
that can run PPP but it is a complicated procedure.
When the stick is not recognized, make sure you have uptodate software on the router (e.g. 6.35.2 or 6.35.4)
i think rb3011 would b good start and CCR1009-PC(silent one).
persently there was too big gap.
if you okay with fastpah, fasttrack and other stuff like that and run quite minimalistic config - you can try HEX/HAP aswell.