I see commercials for cell phones and other products that spin and you can see the sides and back of the product.
I'm thinking that the easiest way to get this effect is to get video of the product with a background that you can remove in post. Then get video of the object spinning at different speeds. Then you can do retimming later.
Here's the thing, though; even though you *could* do it by actually putting the phone or whatever on a turntable (or rotating the camera around it), you just wouldn't bother going to all that trouble. It's just so much easier, cheaper and more flexible these days to do it in 3D.
Either the client provides the 3D model of the product, or you buy it from somewhere like The 3D Studio, and away you go.