Frozen touchpad on iphone 6 having a passcode
Doing a force restart might take care of frozen screen.

Link to apple help page: https://support.apple.com/en-in/HT201559


  You should force restart your iPhone, iPad, or iPod touch as a last resort, and only if it's not responding. To force restart your device, press and hold both the Sleep/Wake and Home buttons for at least ten seconds, until you see the Apple logo.