The specifics might differ, but these reboot instructions generally apply regardless of the phone manufacturer or Android version.
Press the Power Button
Press and hold thepower buttonfor a few seconds.
It’s usually on the right side of the machine.

A menu will appear with thePower offoption.
The latest Android version might offer other options, includingRestart, which is a better option.
Some devices work a little differently.

Not every Android machine is programmed to do a hard reboot the same way.
Many devices reboot when you hold down the power button.
However, it may take 10 to 20 seconds before it’s triggered.
If that doesn’t work, try holding down both thePowerandVolume Upbuttons for up to 20 seconds.
After that, the screen will go black, signaling that the gear has powered down.
Factory resetting an Android deviceis very different from rebooting one.
Learn vs resetto see which option is best for you.
Then, reattach it and power on your phone or tablet.
It’s a great backup if you’ve exhausted all other options.
Don’t touch the battery or any components on the gear with your fingers.
Instead, use a piece of plastic, such as a guitar pick, to pop the battery out.
Some devices include a battery lock or switch that you must press to pop it out.
Try Closing Apps Instead
You don’t always need to reboot to solve problems.
If your machine is running slowly,closing a few appsmight speed it up.
In the meantime, it continues to consume memory.
Then, swipe up on an app to close it.
To close apps in this view, tap theXon each app or tapClose All.
In the Task Manager, you’re able to choose to close or exit apps.
On some phones, the Task Manager is aPie Charticon.