Windows Phone fans on Sprint don't have to worry about when they'll get the 8.1 update on their devices. The carrier tells Engadget that both the HTC 8XT and Samsung's ATIV S Neo are getting 8.1 sometime this summer; more details should come closer to the rollout. That's later than when we'll see the OS preloaded onbrand newdevices, but it's good news for those who are still happy with both Microsoft's mobile platform and Big Yellow's network.