RouterOS mobile networking

A cellular modem appears as /interface/lte (LTE, 5G NR, MBIM; built-in or USB or mPCIe modems) and its network parameters live in an APN profile (/interface/lte/apn). Direct-IP and MBIM modems are supported in v7 and the MBIM driver loads automatically; test an unrecognised modem on v7 before asking for support on v6. The SXT LTE (RBSXTLTE3-7) needs the optional lte package. To use a PPP interface instead (lower throughput), set /interface/lte/settings/set mode=serial and reboot (this property was ignore-direct-modem in v6).

Bring up an LTE uplink

/interface/lte/apn/add name=profile1 apn=internet.example authentication=chap user=USER password="REPLACE-ME" ip-type=ipv4
/interface/lte/set [find] apn-profile=profile1
/interface/lte/print                                # flag R = running
/interface/lte/monitor lte1 once                    # status, operator, band, rssi, rsrp, rsrq, sinr, cell id, imei/iccid
/ip/firewall/nat/add chain=srcnat out-interface=lte1 action=masquerade