Zte N285, Руководство пользователя

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Adjusting the volume
When you’re on the phone or listening to songs, watching movies, or using
other media, you can use the Volume keys on the right side of your phone to
adjust the audio volume. Otherwise, the keys control the volume for the ringer,
and other sound effects.
Battery
The lithium ion battery of the mobile phone can be immediately used after unpacking.
Installing the Battery
1. Pull the battery cover from the notch on the bottom and remove the cover.
2. Insert the battery by aligning the gold-coloured contacts with the contacts in
the battery slot.
3. Push down the upper section of the battery until it clicks into place.
4. Replace the battery cover and close it gently until you hear a click.