讀後心得

A female netizen shared on social media about receiving a “pick up and hang up” harassment call, which sparked heated discussion. These types of calls are actually operated by “number screening machines,” whose purpose is to verify whether a number is still in use and then resell valid numbers to companies, leading to subsequent sales calls. To avoid becoming a target, netizens suggest downloading the Whoscall application, which can filter incoming call information and help users identify suspicious calls.

Common harassing phone calls in life often cause annoyance. A female internet user shared on a social media platform about receiving a call that was "hung up immediately," sparking enthusiastic discussions among netizens. However, this type of call is not the fraud or prank that most people imagine, but rather the so-called "number screening" mechanism, aimed at confirming whether a phone number is still in use, thus establishing an effective phone database for specific businesses.

What does 'hung up immediately' mean?

A female internet user mentioned in a Facebook group that she had received a call, and as soon as she answered, the caller hung up. She was curious and searched for the phone number online, discovering that many other netizens had similar experiences, and some even found that returning the call was unsuccessful, leading her to question: "Does making a call cost money? Is it because there's too much money, or is there another reason?"

The 'number screening machine' confirms if the number is in use

The post attracted explanations from knowledgeable netizens, revealing that these calls are actually the operation of a "number screening machine." The system automatically dials to test whether the phone is in use; once answered, it is registered as a valid number and later sold to other clients, resulting in continuous harassing calls for loan promotions, which is quite troublesome.

Countermeasures for 'hung up immediately' calls

To avoid becoming a target for harassing calls, netizens suggested downloading the Whoscall app, as this app actively filters and displays incoming call information, including suspicious calls that ring once and hang up. It is available for both iOS and Android systems, and once installed, any incoming calls will directly display the identity of the caller, allowing users to decide whether or not to answer.

▲ After downloading Whoscall, you can see the incoming call information.

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