How to End Calls with Power Button on HTC 10
Touching the end call button is all it takes to hang up and disconnect an ongoing (incoming or outgoing) call. But if you want to end calls with ...
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Sometimes you need to perform a soft reset your HTC One phone if it is slow, some apps are not working or are unresponsive. Learn How to Restart HTC One by doing as follows:
1. Make sure the screen is ON (Press the Power button and then unlock the phone)
2. Press and hold the "Power" button
3. Tap on "Restart"
4. you may ask to confirm the process
See: How to Do Factory Reset on HTC One