HTC Desire 520 is running slower than normal, is unresponsive, or has an app that is not performing properly, try rebooting and see if that helps solve the problem.
If the display is off, press the POWER button to turn it back on.
Press and hold the POWER button, and then tap
When asked to confirm, tap
Note: If these steps don't work, you can remove and reinstall the battery, and then turn
HTC Desire 520 on to restart it.