Sprint in association with Best Buy announced the Best Buy One Family Plan, offering two lines of unlimited talk, text and data for $100 per month.
Families can add up to eight lines for $40 per month per line.
Since bigger rivals AT&T and Verizon do not sell unlimited data to their customers, the SoftBank-owned Sprint aims to add more families to its data plans.
Compared to T-Mobile, Sprint customers save nearly $400 over two years for two unlimited lines and two Samsung Galaxy S 6 leases.
Sprint Lease allows customers to pay zero out of pocket at lease signing for their smartphone. At the conclusion of the lease period, customers in good standing have several options, including returning the smartphone and leasing another device or purchasing it.
In March, Best Buy and Sprint added the Best Buy One Plan, offering unlimited talk, text and data, plus Sprint smartphones for one low monthly price.
