Green Tips; Save Energy - Nokia 5530 XpressMusic User Manual

Q: Can I use my Nokia device as a fax modem with a compatible PC?
A: You cannot use your device as a fax modem. However, with call diverting (network
service), you can divert incoming fax calls to a fax number.
Q: How do I calibrate the screen?
A: The screen is calibrated at the factory. If it is necessary to recalibrate the screen,
select Menu > Settings and Phone > Touch input > Touch screen
calibration. Follow the instructions.
Q: Why do I get the error message Expired certificate or Certificate
not valid yet when I am installing a downloaded application?
A: If Expired certificate or Certificate not valid yet is displayed, even if the
certificate should be valid, check that the current date and time in your device are
correct. You may have skipped the setting of date and time when starting the device
for the first time, or the mobile network may have failed to update these settings
to your device. To resolve this, select Menu > Settings and Phone > Phone
mgmt. > Factory settings. Restore the factory settings, and when the device
restarts, set the correct date and time.

22. Green tips

Here are tips on how you can contribute to protecting the environment.

Save energy

When you have fully charged the battery and disconnected the charger from the
device, unplug the charger from the wall outlet.
You do not need to charge your battery so often if you do the following:
● Close and disable applications, services, and connections when not in use.
● Decrease the brightness of the screen.
© 2009 Nokia. All rights reserved. 129