On Sprint. Got the update yesterday, but did have to check manually for it. From what I noticed for me personally, I.E. your mileage may vary. The phone seems a touch more responsive. Nothing earth shattering, but nice none the less. The camera, for me is a completely different camera. HDR comes out smooth without grain with almost no hesitation. And the camera hasn't blown out the sunlight like no tomorrow. I've only tested for about 15 mins in complete auto mode, but if this holds up, this will quench wanting to upgrade already to the V40.