Looking through this: http://wiki.mikrotik.com/wiki/Supported ... _LTE_cards
A lot of the cards/usb devices that are available easily are only supported on ROS7. I'm not interested in getting into a discussion when ROS7 will be ready, but what's the possibility that whatever has been done in the LTE package to support some of these cards in ROS7 be backported to ROS6?
Searching for the particular device I wanted to use (K5150) on here have found a few threads of people who want to use it but aren't able too, but it works in ROS7, my backup was a Sierra wireless MC73xx MiniPCI-e card, but that's also listed as tested on ROS7 as well.
Really wanting to use Mikrotik devices for a large off-grid project I'm about to embark on, I'm sure there would be value for others if this was done.