Acryli
Very similar, AT Command documentation must be used.
Because the EM12 returns me the value 2 for the command AT+QCFG, but I’m still having a PPP (and also an lte1) interface listed on RouterOS 7b8.
…
How do I change the EM12 to MBIM mode?
AT+QCFG=“usbnet”,2 ???
interface lte at-chat lte1 input=“AT+QCFG="usbnet"”
output: +QCFG: “usbnet”,2
OK
This is MBIM and yes, I not see any usb1 interface at EM12-G at EM12GPAR01A18M4G at ros7.1beta2 - I recomend to upgrade to that latest version bcs ros7b8 have bug with route’s and probably that why you not have internet.
Much more strange is that I’m getting an IP from my ISP (10.x.x.x) but I have no internet connectivity at all (yes the SIM card is ok and APN also), so I don’t know what I’m doing wrong on my RBM33G, but maybe it’s related to the setting of the PP interface :-/
Probably you must uncheck Use Network APN to force use your own APN.

CellLock is possible, check post: http://forum.mikrotik.com/t/chateau-lte12-and-r11e-lte6-passthrough/138488/1