Sprint’s MVNO Ting recently took to their blog to let subscribers know that they, too, support the Nexus 5. All you need to do, of course, is to purchase the Nexus 5 and one of Ting’s SIM cards. Once you have these two items, you can head to the carrier’s support forums for help in activation.
Keep in mind that both the Nexus 5 and Ting SIM cards are not all that easy to procure. The smartphone has slipped on shipping timeframes and the SIM card requires you sign up for a wait list.