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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
SIM or
USIM card
error
No network
connection/
Dropped
network
Codes do
not match
Troubleshooting
Possible causes
There is no SIM
or USIM card in
the phone or it is
inserted incorrectly.
Signal is weak or
you are outside the
carrier network.
Operator applied
new services.
To change a
security code,
must need to
confirm the
new code by
re-entering it.
The two codes
you entered do not
match.
Possible corrective measures
Make sure that the SIM or USIM card
is correctly inserted.
Move toward a window or into
an open area. Check the network
operator coverage map.
Check whether the SIM or USIM
card is more than 6~12 months
old. If so, change your SIM or USIM
card at your network provider's
nearest branch. Contact your service
provider.
If you forget the code, contact your
service provider.
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