And who will CONFIRM that they are accurate? AT&T can say what they want to say. But who will determine whether they are telling the truth?
If I have a dispute with the Electricity, Gas, or Water company, I can count on county officials who have reports, tests, etc with regards to the meters installed at my house. Each of them have a seal, that this type of meter is determined to be accurate by some sort of weight and measurement institute.
Every gas pomp in the county is tested for accuracy by a county or state official, and gets a seal of approval. You see the seal, you know you are getting an exact gallon when the meter says you got a gallon.
But who will check on AT&T? Is it just AT&T's word that says "we promise we have an accurate meter", or do we as consumers have any source besides AT&T itself that can mediate, and test meters as needed?
"I reject your reality and substitute my own!"