User's Manual

109 110
11
Troubleshooting ..................
Before contacting the service center, here are some
instructions to help you troubleshoot your device:
• You are advised to fully charge the battery for
optimal operation.
• Avoid storing large amounts of data on your phone
as this may affect its performance.
• Update your phone's software via the Updates
application. Or you can tap Settings > System >
Advanced > System Update to update software.
• Reset your phone via Factory reset. You can tap
Settings > System > Advanced > Reset options >
Erase all data (factory reset), and then tap Erase all
data.
and carry out the following checks:
My phone can't be switched on or is frozen
• Check the battery power level and charge for at least
20 minutes.
• If it still does not work, please reset the phone using
the Power key and the Volume up key.
My phone has not responded for several minutes
• Restart your phone by pressing and holding the
Power key.
My phone turns off by itself
• Check that your screen is locked when you are not
using your phone, and make sure the Power key is
not mis-contacted due to unlocked screen.
• Check the battery charge level.
My phone can't charge properly
• Make sure that your battery is not completely
discharged; if the battery power has been empty for
a long time, it may take around 20 minutes to display
the battery charger
• indicator on the screen.
• Make sure charging is carried out under normal
conditions (0°C (32°F) to +50°C (122°F)).
• When abroad, check that the voltage input is
compatible.
My phone can't connect to a network or "No service"
is displayed
• Try connecting in another location.
• Verify the network coverage with your service
provider.
• Check with your service provider that your SIM card
is valid.
• Try selecting the available network(s) manually.
• Try connecting at a later time if the network is
overloaded.