1.测试其他APP是否有声音提示，如果只是某个APP没有提示音，其他APP可正常使用，请尝试卸载该APP重新安装。
2.找到主屏幕背面左下角的塑料盖板打开，连续按下多次音量加按键调高音量。
3.如果音量仍然没有提高尝试重启机具观察是否恢复正常。
4.不要屏蔽App通知：点击设置->提示音和通知->通知->应用通知->相应APP->屏蔽，看看是不是开启了屏蔽功能，如果开启，关闭即可。
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limitations under the License.Copyright 2023. Intercom Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
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