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16 Troubleshooting
Problems and solutions
Problems
The mobile phone can
not be switched on.
The display is "locked"
when the mobile phone
is switched on.
No signal quality is
displayed.
Troubleshooting
Solutions
− Insert battery, charge
and try again.
− Enter the PUK to
"unlock" the SIM card.
Contact your network
service provider.
− No network connection.
The mobile phone is in
a location where there
is no network service.
Move to a different
location or contact
your network service
provider.
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