请教手机待机模式？

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<p>人们老说手机待机时间是多少多少，但手机待机是什么意思？</p><p>我以前一直一位就是不打电话，不发短信就是了，可下面一段话：<span style="FONT-SIZE: 10.5pt; COLOR: blue; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">所谓空闲模式是指移动台处于待机状态，尚无业务存在时的状态</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">。没有业务存在：我的理解是没有插SIM卡，请教高手是不是这样？谢谢！！！</span></p>