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89
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 or USIM
card error
There is no SIM or
USIM 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, must confirm
the new code by
re-entering it.
If you forget the code, contact your
service provider.
The two codes you
entered do not match.
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