Though, of course, it's not 100 percent free. New customers have to purchase a Sprint SIM card ($2.99 and $10 shipping) and enroll in autopay. There's also a $2.39 monthly fee ($1.99 administrative fee and $0.40 regulatory fee) because you're never going to escape those incomprehensible fees.
Importantly for customers thinking of making the change, USA Today reports there's no contract. So, you'd be free to change companies once you've high-fived away your year of free service.
If you take Sprint up on the offer, you keep your number and are enrolled in Sprint's unlimited plan. When it's not being gifted, that plan costs $50 per month for a single line and $90 per month for up to five lines. The plan includes unlimited talk, text, and 4G LTE data, as well as 10 gigabytes of mobile hotspot and video streams in high definition, according to the USA Today.