大多数这些客户都使用的是入门级的手机，但这些顾客依然在不断地升级他们的手机，让手机有耳机可以播放多媒体文件，浏览网页并在路上随时发送电子邮件。

The majority of these customers use entry-level phones, but these subscribers are increasing upgrading to handsets that can play multimedia files, surf the Web, and send e-mails on the go.

youdao

入门按照使用耳机之前，这三个步骤：1。

GETTING STARTED Follow these three steps before using your headset: 1.

youdao