Isn't the whole point of smart meters rhat they dont need to be read? They send data via mobile networks to your energy provider.
In theory they don't but don't dare change to another provider (as you should do if you shop around and one is sinficantly cheaper).
If you change to a different supplier of gas and/or electric some models of smart meter stop working meaning they're in effect manual meters and should be read - something which is infinitely more difficult to accomplish when compared to the old replaced 'non smart' meters.
Tbf the newer models of smart meters are meant to have eradicated this problem but it still remains for a significant percentage of smart meters currently in use.
If you can possibly avoid having a smart meter installed then you should do so imo. The only problem is some cheaper deals with lower tariffs now insist on them.