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The battery is worn.
Buy a new battery.
normal
If there is no any signal,
the phone will try to get it.
And your phone will need
much more power.
Go to the place where the
signal is high.
Or switch off your phone.
SIM
card
is
damaged.
Take it to your network
service dealer and check it.
Wrong installation of SIM
card.
Install it correctly.
SIM card faulty
SIM card or its socket is
dirty.
Clear the SIM card or the
socket on the phone.
Failed SIM card.
Contact your network service
dealer.
Out of the service area.
Consult with the network
service dealer and make
sure you are in the service
area.
Lower signal
Move to a place where the
signal is high.
Cannot
subscribed the
network service
Failed line.
Try another line.
Message
sending fail
Not apply message
service or wrong message
center number.
Contact your network service
dealer and ask for the correct
number.