'''''AT&T Mobility v. Concepcion''''' is a 2011 case decided by the United States Supreme Court. In a 5-4 decision, the Court held that the Federal Arbitration Act preempted California law requiring [[class action]]s to be available in consumer contracts. | '''''AT&T Mobility v. Concepcion''''' is a 2011 case decided by the United States Supreme Court. In a 5-4 decision, the Court held that the Federal Arbitration Act preempted California law requiring [[class action]]s to be available in consumer contracts. |