Change The Volume Of A Call, Song, Or; Video - Nokia 603 User Manual

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If the battery has not been used for a long time, to begin charging, you may need to
connect the charger, then disconnect and reconnect it.
Charge the battery over USB
Battery low, but you don't have a charger with you? You can use a compatible USB cable
to connect your phone to a compatible device, such as a computer.
You can use USB charging when a wall outlet is not available. Data can be transferred
while charging the device. The efficiency of USB charging power varies significantly, and
it may take a long time for charging to start and the device to start functioning.
You can use your phone while it's charging.
To avoid breaking the charger connector, be careful when connecting or disconnecting
the charger cable.
Change the volume of a call, song, or video
Use the volume keys.
You can adjust the volume during a call or when an application is active.
The built-in loudspeaker allows you to speak and listen from a short distance without
having to hold the phone to your ear.
Activate or deactivate the loudspeaker during a call
Select or .