LG P690 User Guide

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13.  When the screen 
freezes
If the screen freezes or the phone 
does not respond when you try to 
operate it:
Remove the battery, reinsert it, 
then turn the phone on. If it still 
does not work, please contact the 
service centre.
14.  Do not connect your 
phone when you turn 
on/off your PC. 
Make sure you disconnect the 
data cable between your phone 
and PC; leaving it connected might 
cause errors on your PC.