Hi guys,
I have both these models on my desk and seems neither works with my RB411UHAR for some reason.
The problems stars already with the serial interface, it seems like there is only data channel 0 available on both modules,
while with other modules with /port print you can see more than one channel.
Running Router OS 5.19 btw.
I have the two supout.rif files, hope they help 
Thanks!
Kind regards,
Daniel
supout 8704.rif.zip (195 KB)
supout 7710.rif.zip (197 KB)
I have a RB411UAHR and MC7710 running perfectly well with 3G/4G.
I’ve upgraded my router yesterday to v5.19 and is working until now.
With MC7710 you should have an LTE interface, just set the APN and add a dhcp-client to this interface. It can take about a minute to start running.
Try running a fresh install (netinstall) and upgrade the bootloader.
Thanks for your input. The LTE interface infact does work, I thought that I would still need the ppp dialer for the login,
but that was not the case.
On the other hand, I get a address via DHCP, but thats about it. It doesn´t work any further.
When I reboot the device, I get a DHCP lease again, but I cannot connect to the outside world.
Any suggestions on that?