Phone sim faster than 4G broadband sim!

Hi all - I'd really appreciate any thoughts on the following:

I have a '3' sim-only phone contract that includes unlimited data and, when accessed in my living room, offers me speeds of between 80mbps and 120mbps depending upon time of day etc. I use the sim-card in a relatively old Huawei Mate 10 Pro phone. I also have a '3' 4g broadband sim-card that I use in the Huawei b535-232 router that was provided with the sim. This achieves speeds as low as 2mbps and rarely higher than 60mbps (in exactly the same spot in the living room). I can’t understand why there would be such an enormous disparity between the two? I recognise that hot-spotting my phone would be nowhere as effective at supplying wifi to my home as the router would, but why is the router SO much poorer at attracting the higher speeds than my modest phone?

Is there potentially something I’m missing or some setting I should be looking to change in my router, so that it matches the efficiency of my phone? There is obviously great potential to reach decent speeds from my local '3' mast, but why on earth is my router not capable and/or configured to take advantage of this to the extent that my humble phone is?

Many thanks in advance.

In reply to a post by mmhexeter:

Is there potentially something I’m missing or some setting I should be looking to change in my router, so that it matches the efficiency of my phone?

Most of the routers are "old technology". 4G (LTE) devices are described by the Category of the radio they include.

Your Huawei Mate 10 phone from 2017 will easily handle multiple radio transmissions and join them together to give a fast highway. (Think motorway with multiple lanes). This is a LTE Category 18 device.

Your b535-232 router is much older design, and only an LTE Category 7 device. It can't make use of all the parallel transmissions from the mast, so your internet traffic is stuck in a traffic jam on a 2 lane road and can't overtake.

Very hard to find high specification routers, and they cost a fortune.