https://www.reuters.com/article/us-doj-at-t/u-s-said-to-investigate-att-verizon-over-wireless-collusion-claim-source-idUSKBN1HR2Z8

The U.S. Justice Department has opened a probe of potential coordination by AT&T Inc , Verizon Communications , a telecommunications standards organization and potentially other providers to hinder consumers from easily switching wireless carriers, a person briefed on the matter said on Friday.