3890 5730 — Spam Report / 垃圾電話報告

About this number / 關於此號碼

3890 5730 often repeats third-party product or service pitches, which is why many users read it as a negative outsourced marketing call. Accumulated reports indicate 3890 5730 tends to open with a Call Center / 外判推銷 pitch. If 3890 5730 keeps calling, most users want more context before answering again.

若 3890 5730 再次來電，通常仍會以第三方產品或服務促銷與轉介安排為主軸，屬偏負面的外判銷售來電。 累積的回報顯示 3890 5730 多以 Call Center / 外判推銷 的方式開場。 如果 3890 5730 持續來電，通常代表接聽者希望先核實其背景。

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.