Hi, I've got a new 5g 48 SIM.
According to the comreg coverage map I'm right in the middle of a "Very good coverage" area for 48 on both 4g and 5g.
With the SIM in my phone I get about 60mb/second on 5g, slightly slower on 4g which strikes me as pretty slow (despite 4/5 bars of mobile signal - at the point in my house with the strongest signal).
Meanwhile with the same SIM in a 5g gateway/router I get 1-3 mb/second on 5g (upload speed about double that, weirdly), about 25mb/second on 4g!
I've checked the network and apn settings which appear correct.
Previously I was getting 5g at about 110mb/second on Vodafone (with upload about 20-30mb/s; slower speed with that SIM in my phone), giving me confidence the router works and that it's a 48 / router issue.

I'm wondering if the router is being throttled by the network, but I have used barely any data so far (have used about 5gb since connecting earlier this week).

Does anyone have any suggestions as to what might be going on or how I might improve this?

I don't get why the speed is so very much slower through the router than through my phone (when the router was faster on Vodafone).

Thanks in advance for any suggestions