The agency's New York, San Francisco, Los Angeles, and Chicago offices will work on the account, which it won after a competitive review, said Christine Bock, mobile and telecom practice leader at Finn Partners. The firm, which spun off from Ruder Finn in December, will manage the account through June, she said.
NetZero designed the consumer-facing mobile broadband network service to compete with similar offerings from AT&T, T-Mobile, Sprint, and Verizon.
NetZero, which is best known for its dial-up services, will move into the wireless space with the launch. The agency's work will focus on raising awareness of the new service, which will allow consumers to purchase 4G wireless service starting at $9.95 a month. It will be available in more than 80 US cities, including New York, Los Angeles, Chicago, Miami, and Washington.
Finn Partners' mobile and technology client roster includes Vonage, Marvell, StubHub, and Logitech.
NetZero was not immediately available to comment.