Troubleshooting - Sony Xperia S LT26i Startup Manual

Troubleshooting

My phone is not responding
If your phone hangs, or if you cannot restart it normally, you can
force restart the phone.
To force restart your phone
1 Press and hold both the volume up key and the power
for five seconds.
2 After your phone vibrates once, release the keys. The phone
restarts automatically.
key