Honestly, none have been announced. However, I can tell you LG has a 3D phone on another carrier and it seems that 3D may get more popular. If so you can bet there will be other 3D phones on Sprint too.
Sprint S.M.A.R.T Agents Sprint S.M.A.R.T Agent are here to help Monday through Friday 6:00 AM CT - 6:00 PM CT. If you need to speak to an agent outside of these hours, please visit Sprint Chat