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🔊 声音检查 · Sound check

依次点下面三个按钮。Tap the three buttons in order.

🔕➡️🔔 听不到「叮」?请打开手机侧面的静音开关(看不到橙色),再按音量键调大。
Can't hear the beep? Flip the side switch off silent and turn the volume up.

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