Justice Department wants info from AT&T, Verizon, T-Mobile and Sprint

The antitrust division is looking into whether or not carriers colluded in stifling technology that allows customers to switch providers without having to change out their SIM card.
— Read on www.cnbc.com/2018/04/20/justice-department-wants-info-from-att-verizon-t-mobile-and-sprint.html