This subchapter does not annul, alter, or affect, or exempt any person subject to the provisions of this subchapter from complying with, the laws of any State with respect to telephone billing practices, except to the extent that those laws are inconsistent with any provision of this subchapter, and then only to the extent of the inconsistency. The Commission is authorized to determine whether such inconsistencies exist. The Commission may not determine that any State law is inconsistent with any provision of this subchapter ^[1] if the Commission determines that such law gives greater protection to the consumer.