Nokia XPRESSMUSIC 5530 User Manual page 183

Troubleshooting 183
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.
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