Android - How to restart an Android device?

The menu you get when you press the power button should give you a list of options including Shutdown, Restart etc. If it doesn't, your phone's manufacturer might have left it out of the ROM.

Use the app Quick Boot to restart your device (a rooted device).

Answer seems to be given partially here: I've rooted my phone. Now what? What do I gain from rooting?

Use the app Quick Boot to restart your device. Start the Quick boot app and choose 'Reboot' and there you go.

Press (volume up + Power) at the same time. It will reboot the phone. Tested on Galaxy S Captivate.