需要準備的材料有：手機、聯通營業廳
1、首先打開聯通營業廳，點擊下方“服務”選項。
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2、然後在該頁面中點擊左側“查詢”選項。
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3、之後在該頁面中點擊“我已訂購”選項。
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4、然後在該頁面中找到彩鈴後點擊“我要退訂”選項即可。
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