I might be too picky on this but I find it annoying having to attach/detach my phone from the phone car mount, specially when I need to grab the phone while driving. I don’t mind magnetic mounts, they’re way more practical but they need to have a magnetic cover on my phone which I don’t want as it will end up being thicker and bulky. So the other alternative was finding a stick car mount.
I recently read about TYLT, a brand that has a unique design in everything they build. One of their products was a sticky phone car mount. So far my Nexus 4 has been sticking without leaving residue and it’s been working like a charm. I’m pretty sure it works well with iPhones but I’m not sure about BlackBerry’s. Also comes with support arms in case your device does not stick.