LG -P714 Guide De L'utilisateur page 282

Troubleshooting
Message
Any
application
cannot be
set
Calls not
available
Phone
cannot be
switched on
78
Possible causes
Not supported by
service provider
or registration
required.
Dialing error
New SIM card
inserted.
Pre-paid charge
limit reached.
Power/Lock key
pressed too briefly.
Battery is not
charged.
Battery contacts
are dirty.
Possible corrective measures
Contact your service provider.
New network not authorized.
Check for new restrictions.
Contact your service provider.
Press the Power/Lock key down for at
least two seconds.
Charge battery. Check charging
indicator on the display.
Clean the battery contacts.