LG D838 User Manual page 19

9. When the screen freezes
If the screen freezes or the phone does not respond when you try to operate it:
Press and hold the Power/Lock key for 8 seconds to restart your phone. Or, remove
the battery, reinsert it, then turn the phone on. If it still does not work, please contact
the service center.
10. Do not connect your phone when you power on/off
your PC
Make sure to disconnect your phone from the PC when powering your PC on or off as it
might result in PC errors.
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