讀後心得

Recently, a female netizen shared her experience of receiving "hang-up" harassment calls on a social media platform, sparking lively discussions. These types of calls are actually the operation of a "number screening machine," with the purpose of verifying the validity of phone numbers in order to build a phone database for resale to businesses. To avoid becoming a target of harassment, netizens suggest using the Whoscall app, which can filter suspicious incoming calls and display caller information, allowing users to decide whether to answer.

Harassment calls commonly found in life can be troublesome. A female netizen shared on a social platform about receiving a call that was "hung up immediately," sparking heated discussions among netizens. However, this type of call is not the scam methods or pranks that most people imagine, but rather the so-called "number screening" mechanism, which aims to confirm whether a phone number is still in use, thus establishing an effective database of phone numbers for specific businesses.

What does a call that hangs up immediately mean? A female netizen posted in a group stating that she had received a call, and as soon as she answered, the other party hung up. She curiously looked up the phone number and found that many netizens had similar experiences. Some even attempted to return the call only to find it unreachable, causing her to wonder, "Doesn't making a call cost money? Is there too much money? Or is there another reason?"

The "number screening machine" confirms whether a number is in use. Netizens explained that these calls are actually the "number screening machine" at work. The system automatically dials to test whether the phone number is in use. Once answered, it gets registered as a valid number, which is then resold to other clients, leading to a continuous stream of harassing calls such as loan promotions, which can be quite troublesome.

Countermeasures for immediate hang-up calls. To avoid becoming a target of harassment calls, netizens recommend downloading the Whoscall app, as it actively filters and displays caller information. This includes suspicious calls that hang up right after a single ring. The app can be used on both iOS and Android systems. Once installed, if someone calls, the caller ID will be displayed directly on the calling screen, allowing users to decide whether to answer or not.

▲ After downloading Whoscall, caller information can be seen.

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