I have banged on a bit in the past concerning Telit miniPCIe LTE modules which work on Band 28 in a Mikrotik. A few months ago I bought a Telit LE910C1-AP from Glyn in Sydney to see if it came up in LTE mode on the Mikrotik seeing as a lot of work has been done to improve LTE in ROS. Alas, no joy so I left it. I recently saw mention of support for a Telit module in 6.44.rc1 so I decided to revisit the whole thing. It works! The Telit MiniPCI module is: Telit LE910C1-AP https://www.telit.com/wp-content/uploads/2017/11/Telit_LE910C1_Hardware_User... It supports: LTE FDD bands 1, 3, 5, 8, 28 and HSPA+ bands 1, 5, 8 CAT1 speeds 10Mbit down / 5Mbit Up. With speedtest.net I got 9.62/4.86 (ping 29ms) Antenna: SRFL026 (single antenna - no diversity) https://antenova.com/wp-content/uploads/2016/05/Mitis-SRFL026-PS-1.1.pdf Price: $128 inc GST, shipping and patch antenna above as a kit from Glyn's webstore. Talk to these guys if you want to order one. http://www.glynstore.com/pages/Contact-Us.html Dean and Leo are always very nice and helpful with sales and support. A company I used to work for bought a lot of Telit 2G modules from Glyn. Mikrotik Board: RB411 ROS: 6.34rc2 Carrier: Telstra (Two B28 towers within 2kms of me) The board interface comes up as 'usb' in ROS which has 7 channels. I tested all the channels with a telnet client and the remote access setting in ROS using RFC2217. Eventually I discovered channels 4 and 5 respond as a serial interface and it responds to AT commands. For example ----- at&v DTE SPEED : 115200 DTE FORMAT : 8N1 GSM DATA MODE : Not Transparent AUTOBAUD : +IPRxxx00=NO COMMAND ECHO : E1=YES RESULT MESSAGES : Q0=YES VERBOSE MESSAGES : V1=YES EXTENDED MESSAGES : X1=YES LINE SPEED : F0=autodetect CONSTANT DTE SPEED : YES FLOW CONTROL OPTIONS : &K3=HW bidirect. ERROR CORRECTION MODE : RLP CTS (C106) OPTIONS : &B2=OFF while disc. DSR (C107) OPTIONS : &S3=PHONE ready->ON DTR (C108) OPTIONS : &D0=ignored DCD (C109) OPTIONS : &C1=follows carrier RI (C125) OPTIONS : \R1=OFF dur. off-hk C108/1 OPERATION : &D4=NO POWER SAVING ON DTR : +CFUN:1=NO DEFAULT PROFILE : &Y0=user profile 1 OK ----- Great! Obviously the mode of operation for this unit was going to be PPP. This is all you need to get it working in ROS: /interface ppp-client add apn=telstra.internet data-channel=4 dial-command=ATD disabled=no \ info-channel=5 name=ppp-out1 phone=*99# port=usb2 profile=Telstra The beauty of this you get to use the assigned carrier grade NAT IP address from Telstra (for example 10.98.250.114) instead of the double NATed address that comes off a lot of dongles. The RB411 has a sloooow 300MHz CPU so it takes a few minutes for the built in serial port and usb2 to come up in the System->Ports menu. Concerning also is when making changes to or enabling the PPP interface would sometimes fail with: "couldn't change interface <ppp-out1> - object doesn't exist (4)" which is baloney of course. A second attempt always seems to work. The next step is to try it out in a RBwAPR. There are faster CAT11 (more expensive) and slower Cat-M1 modules available too but I have yet to try these out. The LE910C1-AP seems good for those that need B28 at decent speeds for OOBE access or 4G failover in Mikrotik now that Sierra is a distant memory. The new Gen2 NBN routers from Telstra fail over to 6/1Mbit speeds so 10/5 seems OK to me for an industrial rated LTE modem. The module also supports and has connectors for a GPS and a 4G diversity antenna but I have yet to test them out. Jason Hecker