答：修改支付寶綁定手機號即可。修改方式如下：
登錄支付寶，點擊“我的”。
點擊頁面的“設置”
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3.點擊安全設置。
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4.點擊手機號。
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5.點擊更換手機號。
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6.輸入需要換綁的新手機號。
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7.輸入新手機號接到的驗證碼，並輸入即可。
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同壹個手機號碼目前最多可以綁定6個支付寶賬戶。若手機已被6個賬戶綁定，可以先嘗試取消其中壹個支付寶賬戶的手機綁定後，再將手機綁定到現在的賬戶。或者也可以更換其他手機號碼進行綁定。如果在手機端無法自助修改手機號，還可以電腦端修改。
信息提交成功後，支付寶客服會在48小時內進行審核。請耐心等待。