How can I force a reboot on my Xperia S?

[#1]

Hi,

Just installed an app and was working fine, then on a loading screen it froze. None of the buttons work, not even the power one, so I can't restart it myself. Is there any way of fixing it as appose to just letting it run out of battery?

[Nabeel · Accepted solution]

power button + volume up button

5 seconds - restart

10 seconds - shut down