RouterOS 6 works with ECM and ADB means, lte1 in ECM and usb1+pppout1 for ADB.
RouterOS 7 works with the same and MBIM who is as lte1.
I use many Quactel modules and they all works in MBIM mode with ros7.1beta2 - mostly all works perfect but read this two post:
Know problems:
- LTE is slow (30mb instead 140Mbps at the same CellLock 1band)
LTE b7+b7 does not work Chateau 12 - remote SIP not register
Chateau LTE12, No VoIP with RouterOS v7.0beta7 or beta8, works with beta5 and beta6
Both work’s properly in ros7beta5