I've tested 7.x version few days ago , there was a lot of problem with it, such as routing tunnels and so on.
Seriously I suggest all of you not to test 7.x version in production environments just use stable versions.

Hi Thanks for your reply. Don't have Powered USB Hub or power injection adapter now. So I have change some value of usb setting on routerboard and upgrade firmware of it. By doing those changes it's long time that every thing working good. By the way I reply the result and all changes that I have fo...

Hello guys I have bundled a E3372s HiLink modem with RB951-2HnD, every thing is ok and work normaly, but after a while LTE modem not responding to ping or any network request. LTE interface is shown in interface lists but DHCP-Client does not have any IP from LTE modem and the old ip is gone. After ...

I checked it but doesn't work for me