We use an external antenna and a decent 4G router. That gets us 50-60 meg down/12-15 up. Occasionally it’s a bit flakey but compared to the ADSL, it’s offers way more bandwidth for a lot less cost. £200 for router and antenna, £22 a month with Three. Internal arial/4G wasn’t very good at all.
We are in sight of the mast, and that mast is not heavily congested (i.e. it’s not in a town) but our signal in the house is still rubbish. Hence needing the external. We used a UK company called Solwise who were very helpful and supplied all the kit.
Since then we’ve had Airband knock on the door offering service and a couple of other options are coming. Seems rural broadband is finally getting some notice. We’ll be sticking with the current solution tho as it’s cheap and it works.