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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 card
error
No network
connection/
Dropped
network
40
40
Possible causes
There is no SIM
card in the phone
or it is inserted
incorrectly.
Signal is weak or
you are outside the
carrier network.
Operator applied
new services.
Possible corrective measures
Make sure that the SIM card is
correctly inserted.
Move toward a window or into
an open area. Check the network
operator coverage map.
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.
Troubleshooting
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