In the past two weeks my Incredible has started freezing/shutting down randomly. I usually have to remove the battery to re-boot. Today it is doing it after just a few minutes of use. I've uninstalled the task killer app that was installed several weeks ago, but did not help. I haven't installed any new applications that would coincide with this problem starting. Any ideas? Is it just a defective phone that I should go to Verizon store to exchange?