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手機對講服務（PoC：Push-to-Talk over Cellular）或稱隨按即說、即按即說服務是指是一種透過GPRS/WCDMA/CDMA等流動網絡讓手機能使用Push-to-talk方式的通訊服務。
 | 此條目沒有列出任何參考或來源。 (2017年6月4日) |
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