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Troubleshooting
This chapter lists some problems you might encounter while 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 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/
Losing
network
Signal is weak or you're outside
the carrier network.
Move towards 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 at your
network provider's nearest branch. Contact your
service provider.