Microsoft Corporation RM-609 用户手册

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If this does not resolve your issue, do one
of the following:
Reboot your device. Switch off the
device, and remove the battery. After
about a minute, replace the battery,
and switch on the device.
Restore the original factory settings
Update your device software
If your issue remains unsolved, contact
Nokia for repair options. Go to
www.nokia.com/repair, or in Latin
America, www.nokia-latinoamerica.com/
centrosdeservicio. Before sending your
device for repair, always back up your
device data.
Keep your device software and
applications up to date
About device software and application
updates 
With device software updates and
application updates, you can get new
features and enhanced functions for your
device. Updating the software may also
improve your device performance.
It is recommended that you back up your
personal data before updating your
device software.
Warning:
If you install a software update, you
cannot use the device, even to make
emergency calls, until the installation is
completed and the device is restarted.
Using the service or downloading content
may cause transfer of large amounts of
data, which may result in data traffic
costs.
Make sure that the device battery has
enough power, or connect the charger
before starting the update.
After the update, the instructions in the
user guide may no longer be up to date.
22 Find more help
22
www.nokia.com/support
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