Use a Smartphone Case with ‘The Scissor’
The Universal Scissor Mount is a great solution for you if you have a case on your iPhone, iPod Touch, Blackberry or other device.
The Scissor Module uses rubberized pegs and a spring loaded cross-grip design that pinches your phone, keeping it in place. You can adjust the device within it's grip to avoid buttons or allow access to plugs on any side of the device.
There are a lot of great smart phones out now, and more come out every few months. That is one of the reasons we designed a clever cradle that will hold a variety of devices.
The Scissor is best for gripping phones over 2 inches but less than 3 inches wide.