Do you have one of these? http://www.amazon.com/iOttie-HLCRIO104-Windshield-Dashboard-Holder/dp/B0099RGRT8/ref=sr_1_2?ie=UTF8&qid=1386107450&sr=8-2&keywords=iottie+cell+phone+mount

or

http://www.amazon.com/iOttie-Samsung-Optimus-Motorola-Compact/dp/B00FXSU43W/ref=sr_1_8?ie=UTF8&qid=1386107451&sr=8-8&keywords=iottie+cell+phone+mount

the issue I see with them is that they only fit devices 3" wide. The g2 is 3" exactly, but I use a TPU case with it. Do you think it would still fit?

I use this one. I don't need anything fancy. the suction cup on it is INSANE strong.

http://www.amazon.com/iOttie-Windshield-INCREDIBLE-BlackBerry-Revolution/dp/B0099RGRT8/ref=sr_1_2?s=wireless&ie=UTF8&qid=1358097210&sr=1-2&keywords=iottie

Edit: I keep my n4 in an ionic guardian case so i have to have something larger that can adjust to the size or made to fit the GS3.

I've got this iOttie mount

http://www.amazon.com/iOttie-Windshield-INCREDIBLE-BlackBerry-Revolution/dp/B0099RGRT8/ref=sr_1_2?ie=UTF8&qid=1357850365&sr=8-2&keywords=iottie

And it's unbelievable how powerful the suction is. Holds my phone in the ionic guardian case perfectly and doesn't jiggle/vibrate the phone on rough roads like the cheaper mounts that are less sturdy/rigid will do.

I've had this iOttie one for the past year. It um...holds the phone. The formerly clear strip at the base has yellowed from UV exposure, but aside from that it's been perfect.