Phone bills too high? Spending a fortune on your landline calls? If you don't shop around then you could be missing out on big savings. Calling Plans can save a bundle over your normal provider for UK domestic calls. Check out how far you can reduce your domestic phone bills with the provders listed here.Some offer free user to user calls and more different calling plans. 1. Free calls to other customers, and free unlimited weekend calls to UK landlines 2. Inclusive evening & weekend calls 3. Inclusive daytime, evening & weekend calls.