Two different units, one with iOS 10.03 and the other with 10.1. Both freeze occasionally--sometimes more than once per day, sometimes once every day or so. Unresponsive to home button, screen tapping, anything but resetting by means of pressing power button along with down volume button. No consistency in freezing--no single app or action seems to be at fault. Both 256 GB iPhone 7 Plus units. I wonder whether we're dealing with a hardware issue or iOS issue. Please report your iphone lockup/freeze experiences.