“Customers have 28 days to experience Sprint service. If they are not satisfied, customers can return their device with no restocking fee,” Sprint said in an announcement on Wednesday.
The deal means a family paying $100 for 15GB at AT&T can receive the same plan for $50 at Sprint.
The discount will continue through January 2018 for people who switch between this Friday and January 7, 2016.
Customers who sign a two-year contract will also receive a free Alcatel tablet with one year of included service.
“Our company would be nothing without our existing customers so we wanted to make sure we showed our appreciation to them, too,” Sprint CEO Marcelo Claure said in a statement.
Sprint’s new deal comes a week after T-Mobile announced it would stop counting certain video streams against customers’ data plans.
T-Mobile recently overtook Sprint to become the third-large mobile provider in the country, behind only Verizon Wireless and AT&T Mobility.