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137
Troubleshooting
Using this guide
Overview DT570
Contents
Preparing for use
Basic use
Telephoning options
Advanced telephoning
Phone book
Mail
Settings
Extra features
Using networks
Tips
Troubleshooting
Maintenance
Safety instructions
Technical
specifications
Glossary
A long beep at regular intervals is audible when the battery of the phone
is almost flat. For charging the battery see “Charging the battery” on
page 37.
Long beep at regular intervals