My Nokia (not smart) phone still has most of the £10 credit it had on it when it was gifted to me a couple of years ago. It's hardly ever switched on, and is just there in case of emergencies.
Our phone bill for the landline calls came last week. £1.82 for the past 6 months (all our calls, apart for the free weekend ones that come with the VM landline, go via
https://www.1899.com/).