Sprint and Spotify are working to push the streaming music service out to the wireless carrier’s customers. A planned tie-up between the two companies, similar to one already under way with AT&T and Beats Music, will feature free Spotify trials for Sprint customers and will give them the ability to pay for the service using the carrier’s billing system, according to people familiar with the plan. Some Sprint customers may also qualify for discounts on Spotify’s premium service, which costs $9.99 a month. Sprint plans on announcing the deal at an event in New York City on April 29, sources say. The deal will require approval from the music labels that license their music to Spotify, so it’s possible that the pact could be delayed. Subscription music services have linked up with wireless carriers and pay TV companies outside of the U.S. Until this year, however, none of the major wireless companies in the U.S. were aligned with music services.