Phone will not power up even though fully charged

1. Try and Force ReStart Your iPhone as instructed in this article by Apple ➔ How to Force ReStart your iPhone. If that does not work then -
2. Follow the instructions in this article by Apple ➔ If your iPhone is Non-Responsive or Frozen and see if that helps.
3. If none fo the above works then please contact ➔ Apple Support

Axel F.

If it won't power on, how do you know it's charged at all?