Hi,
My fixed line speeds are limited to about 20mbps down and 5mbps up on fttc.
I have a 3 sim and testing from my phone I have seen in speed tests 60mbps down and 20mbps up - even running tests at busy times I get considerably higher speeds than via the land line.
I am therefore thinking of switching to 4g mobile broadband until higher fixed line speeds are available. If I were to cancel my phone line service do you incur the full £140 connection fee at a later date?