I have SonyEricsson W800i with a custom silicone soft skin case (brand Pivot). The case added enough thickness to the phone so that it would not fit in the car holder (HCH-61) designed for the W800i. I needed a different solution.This universal holder HCH-60 is flexible enough in which my phone with the case fits. The arms you see is actually a single spring-loaded piece that rotates at the middle and clips onto the side of the phone (e.g. top-left and bottom-right, or vice-versa). Ends of the arms are rubberized and holds the phone well. It does not hold the phone from the top, but with the arms activated (clipping from the sides) the phone stays in place firmly without issues. The HCH-60 holder also does NOT have the little hole in the back that's used for external antenna plug (see HCH-61, which does). But that feature is not important to me.Overall, the holder serves its purpose and is more accomodating if you use you phone with a custom case.