#文章首发挑战赛#
Introduction:
Recently, the author received a silent call from a Harbin number, and after calling back, it was said that the service could not be used, and the author was very curious about this matter. This type of silent phone user is not uncommon, and the reason may be related to factors such as unpaid numbers, service suspension, etc., or the use of virtual dialing software.
In any case, users need to be cautious when it comes to silent calls. This article intends to discuss the possible causes of this matter in detail, analyze the consequences and impacts in different situations, and summarize preventive measures and countermeasures, so as to help users be vigilant and avoid being deceived and lost.
First, the basic situation of the telephone
At two o'clock in the afternoon on January 3, 2024, the author received a strange call with the number 162***8728. This is a mobile phone number in Harbin, Heilongjiang, and the attribution is displayed as a virtual operator. After answering, the other party was silent, and no one answered when the author tried to talk, and the other party hung up directly after more than ten seconds. In view of the fact that the number is from my hometown, the author judged that it may be a new number, so I called back.
2. Callback failure prompt analysis
After calling back, it says "The number you dialed is not available for this service". This means that the other person's number is in a state of inactivity. According to the relevant information and personal experience, there are mainly the following possible situations:
1. The number is in arrears
Number arrears are one of the common causes. But considering that the author has been connected to the number for more than ten seconds, this is unlikely. Numbers with arrears often cannot be dialed and received normally.
2. The number is deactivated for violations
If there is fraud or rumors on the other party's number, the operator may suspend the service. However, in this case, the other party's number should not be able to be dialed in.
3. Technical failures such as SIM card damage
If the other party's SIM card fails, the service may not be available. However, answering the call seems to indicate that the phone and SIM card are working normally for the time being.
4. Take the initiative to suspend the service
The other party may request to suspend the service due to the loss of the phone or the prolonged use of the phone. This is more likely. However, numbers that are subject to this measure should also not be able to be called.
In response to the above-mentioned conventional analysis and reasoning, Li Mou, an associate professor at the School of Communication of Beijing University of Posts and Telecommunications, said: "To put it simply, these explanations do not make sense, because how can a number that has been connected suddenly fail to call back?"
Third, virtual number software may
Professor Li suggested that it is possible that the other party is using virtual dial-up software, which usually uses the Internet protocol instead of the traditional network, and will also display an automatically generated virtual number that does not actually exist when dialing. This may explain why the other party dials in but can't call back.
Zhang, a cybersecurity expert at the China Academy of Information and Communications Technology, analyzed that virtual dial-up software may indeed be the cause of this problem: "This kind of software can provide more flexible communication methods, but there are also security and reliability problems. Users are advised to choose and use with caution. ”
4. Risk Warning
Whatever the reason, experts are cautioning when receiving a silent phone call. There are two reasons for this: first, silent calls may try to obtain the user's personal information, and second, they may also induce the user to call back to extract the cost of the call.
In response to the first risk point, Wang Mou, a doctoral student at the School of Criminal Technology of the Chinese Public Security University, warned: "The other end of this type of phone may use various technical means to steal user information, including ID cards, bank cards and other sensitive content." So don't call back or give out random information. ”
As for the second category of risks. Professor Li explained that by luring users to call back through silent calls, the black market can defraud high call fees, and related cases have occurred from time to time. "If you find that your number has been deducted, it is recommended to contact the operator as soon as possible to verify and deal with it. Professor Zhang added.
5. Discussion among netizens
In response to the above content, netizens also launched a heated discussion:
Some netizens said: "I have encountered similar silent calls, and I wondered how it would prompt that it could not be used after calling back." From this article, it dawned on me that it might be the virtual software used by the other party. It's so well written!"
Some netizens also said: "This kind of call to check the attribution of the number is nothing more than several routines, such as insurance sales, real estate agents, online sales, etc." They will also not cause you substantial losses, and it is recommended to just hang up. Another netizen said: "It's true that no matter what phone call, don't leak personal information at will, but I think it's also a good way to start your mobile phone to block unknown calls, at least to eliminate most of the harassing calls." ”
6. Summary and suggestions:
Based on the above analysis, it is recommended that users pay attention to the following points in the face of silent calls:
1. Be cautious about callbacks. It's best not to call back unknown calls unless necessary;
2. Turn on the unknown call interception function of the mobile phone to eliminate harassment;
3. Do not easily disclose any sensitive personal information;
4. In case of suspicious deductions, contact the operator immediately for verification.
By being vigilant and taking simple and effective self-defense measures, users can avoid the potential risks of silent calls as much as possible and protect their own interests and information security.
This topic: Do you usually receive this kind of call?Welcome to leave a comment below, if you like the article, please pay attention and like!