Interestingly when I first dropped my landline and went to Three for my broadband, December 2018, they called it Home MiFi

. They've dropped that description now, but I don't know when.
I upgraded to the 4G Hub on Wednesday. Only intermittent 5G though, very dependent on the time of day and weather conditions it seems, but I did get 730/31 at 16:20 Thursday wireless to my phone in the same room. Going to see how it behaves on the other side of the house today, having just plugged it in there. More 5G masts that side.
Connections: OnePlus 8 Pro on Three 4+ (LTE)/5G and at home Three Mobile, with (Three)ZTE MF286D router giving about 113/20Mbps.