2171 3991 — Spam Report / 垃圾電話報告

About this number / 關於此號碼

2171 3991 often leans on fake authority claims, account issues, or verification requests and comes across as a call that strongly resembles scam activity. Even after blocking 2171 3991, check back occasionally for new community reports. People often look up 2171 3991 to understand the context behind the call.

不少回報把 2171 3991 視為令人戒備的疑似騙案來電，通常圍繞未經核實的金錢要求與個人資料索取展開。 把 2171 3991 加入個人黑名單後，仍可定期查看是否有新回報。 不少人搜尋 2171 3991 來了解這個來電背後的情況。

What to do / 應對方法

Do not return calls to unknown numbers. If you did not expect this call, it is best to ignore it. You can block this number on your phone.
不要回撥陌生號碼。如果你沒有預期此來電，最好忽略它。你可以在手機上封鎖此號碼。

How to block / 如何封鎖

iPhone: Settings → Phone → Blocked Contacts → Add New.
Android: Recent Calls → tap the number → Block / Report spam.