Inconsistent signal quality

I've recently moved houses and I am still using my Rain outdoor router. I am generally very happy with Rain but it is small hiccups like this when it is difficult to reach rain support that is frustrating.

I am getting a similar signal intensity as my last house around -85dbm. Yet I cannot run a zoom conference call and the connection keeps on dropping.

I have requested a technician from Rain but I am met with an email asking to reposition the router. I have no reliable way of telling if the signal is better or worse as the ZTE app indicator jumps between good and terrible for no obvious reason. I also have no way of telling which direction is the nearest tower. Could I please request a technician on this forum to help us out. We may need a powered Ethernet extension to reposition the ZTE device.

Otherwise I might have to resort to switching to a different ISP.