Hi Ian01,

A table is exactly what I initially produced, however with 72% of searches coming from mobile devices I am looking for a more user friendly option in terms of space on screen/readbility.

I do like the idea of calculating the prospective cost over a given duration for the user hence a math driven thingy.

Given that the initial test build is hosted on a site specifically about 0345 numbers ( and reaches people looking into this number only) I'm hoping that confusion re other 03 prefixes will not be an issue whilst I test.

I have held off with landlines so that I can check my facts, but will add these along with the connection fee once I've nailed the mobile networks.

In the future I want to be able to cover a larger number of networks and prefixes, and these will only need to be added to the present rather than needing a new build - and the final app/calculator will be hosted on a totally seperate domain with nothing but the app and a bot updating it.