Block unknown numbers that ring and hang up without leaving a voicemail. Silent calls often signal robocall scams or number‑testing bots, so let your carrier’s spam filter handle them and avoid answering. If the call persists, consider adding the number to a personal block list or using a third‑party call‑screening app. Keep your device’s software updated to benefit from the latest anti‑spam features. When in doubt, don’t return the call—legitimate callers will leave a clear message.
My mobile received a call from this number, but no message was left; as a result, I have blocked the number