https://finance.yahoo.com/news/apnewsbreak-verizon-end-sale-phone-142418746.html

It is the first major U.S. wireless carrier to step back from a business practice that has drawn criticism for endangering privacy. The data has allowed outsiders to track wireless devices without their owners' knowledge or consent.

Verizon, the nation's largest mobile carrier measured by subscribers, said that about 75 companies have obtained its customer data from two little-known California-based brokers that it supplies directly — LocationSmart and Zumigo.