Hello,
This is the USA AT&T version of Netgear AirCard 815S LTE hotspot modem. According to the Wiki it should be supported https://wiki.mikrotik.com/wiki/Manual:Peripherals .
However, using the Mikrotik hAP ac lite and latest updates, after USB connection, the modem does not show up on the System Port list so it doesn't look good from here. The APN is set properly to 'broadband' for AT&T and pinging external 8.8.8.8 is possible, but LTE 'functionality' is minimum and terminal commands showed failure due to 'Modem unsupported!'.
Just putting this out there for reference and wondering if anyone has gotten the 815S to connect properly with recent AT&T firmwares. Another note of interest is that the newer Netgear M1 (MR1100) also does not show up in the port list and has little connectivity, but the M1 does have an ethernet port so it is not solely dependent on USB for wired connection.
Thank you.