In message , at 12:24:16 on Wed,
1 Jul 2015, Theo Markettos remarked:
Since smart meters aren't
standardised and are much more complex than simply reading the numbers off a
variably-shaped box, they don't want to take responsibility for whatever
piece of junk your past supplier fitted. That includes not wanting to get
involved in whatever connectivity the past supplier arranged - the old
supplier contracted with some mobile network, but the new one won't have any
arrangements set up and would have to re-make them piecewise.

Don't be daft, there are millions of meters and only a dozen or so
mobile networks (assuming you count MVNOs as well). Every energy company
having some sort of deal with every mobile network is trivial in the
grand scheme of things.
--
Roland Perry