It might be worth the risk for you since it's so cheap, but don't buy it expecting it to work.Problems:It came factory sealed and broken... the sticky mounting arm bracket had been shoved through it's clips as if it had had something very heavy dropped on it. This also speaks to the cheapness of the plastic.The vent mount (which is why I bought it and soldiered on) doesn't comfortably fit any car I've tried it in. It can technically be mounted in my GF's car, but not with the support brace so it would be wobbly.It barely holds an iPhone 4 with no case, you have to clamp it down hard, and if you angle it just right could probably plug in a charging cable (if you need one). But it does technically hold it well enough. You will have to release the clamp (spring loaded button) and re-clamp it (just squeeze) every time you use it.It does NOT hold a 3GS or a first gen at all. The bottom brace is too small and the curved designs on those models make them just slide off.It does NOT fit a 3GS with a case on it. My GF uses a very thin back shell and at maximum width it can be crammed in but just barely, and again, because of the curved phone design the base is too small and it still falls out.Basically if you get one that's not broken and have an un-cased iPhone 4, and plan to mount it with the arm it might work, and it's cheap enough you might want to try. If you want the vent mount don't expect it to fit. If you have an iPhone other than a 4, or use a thick case on a 4, don't expect it to fit. It's very cheaply made from brittle plastic (that you have to stress to set up...) so really keep your expectations in check.