I picked up a used fat bike a few weeks ago that had a Rokform headset cap mount on it. I switched it to my commuter and purchased the universal bracket to put on the back of my phone case. Great mount. Picked one up for my wit as well. They have Samsung and iPhone cases made for the mounts. I purchased the universal brackets for both our phones (and in my wife's case the strap on mount for the bars instead of the much more expensive headset cap mount).