Nokia 5530 XpressMusic - Manual (Page 100)

Connectivity > Admin. settings > Packet data > Packet data connection >
When needed. If this does not help, switch the device off and then on again.
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.
23. 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.
● Set the device to enter the power saver mode after the minimum period of inactivity,
if available in your device.
● Disable unnecessary sounds, such as keypad and ringing tones.
Recycle
Most of the materials in a Nokia phone are recyclable. Check how to recycle your Nokia
products at www.nokia.com/werecycle, or with a mobile device, www.nokia.mobi/
werecycle.
© 2009 Nokia. All rights reserved. 100