# 綁定手機號碼時提示「手機號碼已存在」怎麼辦？

每個手機號碼只能綁定一個 HoyaPay 帳戶，若該號碼已與其他帳戶綁定，將無法重複使用。
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建議您檢查是否已使用該號碼註冊帳號，或嘗試更換其他可用手機號碼進行綁定。


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://hoyapay.gitbook.io/chang-jian-wen-ti-fan-ti-zhong-wen/yong-hu-shi-yong-chang-jian-wen-ti/bang-ding-shou-ji-hao-ma-shi-ti-shi-shou-ji-hao-ma-yi-cun-zai-zen-mo-ban.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.