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105
Troubleshooting
This chapter lists some problems you might encounter when using your phone. Some
problems require you to call your service provider, but most are easy to fix yourself.
Message Possible causes Possible corrective measures
SIM card
error
There is no SIM
card in the phone
or it is inserted
incorrectly.
Make sure that the SIM card is
correctly inserted.
No network
connection/
Dropped
network
Signal is weak or
you are outside the
carrier network.
Move toward a window or into
an open area. Check the network
operator coverage map.
Operator applied
new services.
Check whether the SIM card is more
than 6~12 months old. If so, change
your SIM card at your network
provider's nearest branch. Contact
your service provider.
Codes do
not match
To change a
security code,
you will need
to confirm the
new code by
re-entering it.
If you forget the code, contact your
service provider.
The two codes
you have entered
do not match.