Huawei HG536a User Manual - Page 42

replace the battery., a higher volume. For details, see Setting the Ring tone

Page 42 highlights

a higher volume. (For details, see "Setting the Ring tone " on page 29.) z Symptom: The battery efficiency is very low. - The charging pins may be not clean. Try cleaning them. - The battery life may have reached its end. Contact your service provider to replace the battery. If you encounter faults that cannot be rectified, please contact your network operator for help. 37

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a higher volume. (For details, see "Setting the Ring tone " on page 29.)
Symptom: The battery efficiency is very low.
-
The charging pins may be not clean. Try cleaning them.
-
The battery life may have reached its end. Contact your service provider to
replace the battery.
If you encounter faults that cannot be rectified, please contact your network operator for
help.
37