Three's own MVNO (Smarty) gives you unlimited for £18 without long term contracts. It's £16 if you get it via uSwitch.
The problem with Three's network is that their 4G can be really bad in some areas (eg: parts London). I can't use them inside my flat because it's almost unusable during peak hours. On the other hand, if their 5G is available, speeds can be really good. It's common for me to get 100-900Mbps when near one of their cell towers.
I guess the point is for the average person an unlimited data sim is cheaper than a landline, let alone a landline and a limited data sim, so what's the point in a landline connection
The problem with Three's network is that their 4G can be really bad in some areas (eg: parts London). I can't use them inside my flat because it's almost unusable during peak hours. On the other hand, if their 5G is available, speeds can be really good. It's common for me to get 100-900Mbps when near one of their cell towers.