ZTE MF286D - Can it work in LTE modem bridge mode?

I have Three UK branded MF286D which I'm using as LTE modem.
Unfortunately I have to restart the device every few hours, otherwise the speed drops dramatically.
Stock firmware gives not many settings to adjust, also has no watchdog mechanism, so I can't automate the reset action.

Here is something that OpenWRT could help with, but the question is: Can it work as transparent bridge (half-bridge?) ? I need to assign WAN IP from LTE to my main router, so MF286D should be transparent here. Is that possible to set ?
How to set this up?

Thanks :slight_smile:

What is it doing by default? What is the WAN IP in openwrt on your device?