手机对讲服务（PoC：Push-to-Talk over Cellular）或称随按即说、即按即说服务是指是一种透过GPRS/WCDMA/CDMA等移动网络让手机能使用Push-to-talk方式的通讯服务。
 | 此条目没有列出任何参考或来源。 (2017年6月4日) |
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