Is it risky to use a second hand mobile phone if you don t want to use it by others?

There is a certain risk of second-hand mobile phones being picked up by others, this mobile phone has information you used before, and second-hand mobile phones should delete some things about their privacy

There is no risk, because you bought someone else's used phone, second-hand mobile phone, you don't use it, someone else picked it up and used it, there is no risk.

After a simple operation, you can use the phone's "factory reset" that has deleted data and has used the phone's built-in "factory reset."

Features the phone to restore its original data. And there are also merchants who specialize in this kind of "business".

Recently, the news that second-hand mobile phones can be restored to the original data through technical means has been circulating on the Internet, causing new anxiety among the public about the information leakage caused by second-hand mobile phones.

Traditional computers and today's smartphones, the principles and rules of information storage are basically the same, and a simple factory reset and deletion of files does not mean that the information is completely deleted. "Cyber security expert, Qianxin.

Pei Zhiyong, director of the Industry Security Research Center, said that the "deletion" of a file on the mobile phone, in fact, the system only deletes the indicated path of the file, which means that ordinary people can not find the file, but the actual content information is still stored inside the mobile phone.

Therefore, if you want to recover the stored content information before the mobile phone, it can be done, and the technical threshold is not high. Pei Zhiyong said frankly that at present, in some informal second-hand mobile phone stores, some people will use this method to restore the stored information in the mobile phone, such as mobile phone contacts, text messages and other content involving personal information, and then sell it for a second time to make huge profits.

Industry experts believe that at present, second-hand mobile phones have become one of the sources of personal information leakage, forming a mature gray industry chain, and the personal information obtained from them may be used for spam**, text messages and even telecom fraud.

Just delete the information you used in your phone.

Empty your phone and sell it.

As long as you buy your phone through a legitimate channel and take the right safety measures when using it, second-hand phones are also very safe. Access to real, comprehensive information about on-premises services

First of all, by buying a second-hand phone from a reliable source, you can get a cheaper device than the original price. This means you can get more performance on devices with known reliability without having to worry about being too high.

Secondly, there are a lot of precautions you can take to ensure the safety of your device before buying a used phone. First of all, you should check your phone for malware such as viruses, spyware, Trojans, etc. The inspection process includes, but is not limited to, removing any software and confirming that the phone has adequate security protections.

Finally, [58 City].

It is a well-known classified advertising platform in the Chinese market, providing a large number of classified information, including a large number of classified information such as housing, second-hand cars, recruitment, job search, housekeeping services, second-hand transactions, etc. It offers a lot of convenience, including second-hand mobile phones. On this platform, you can find the right second-hand mobile phone, ensuring that the quality and ** are more reasonable.

In addition to this, the platform also provides a variety of adequate service guarantees, such as logistics delivery, repairs, and refunds, to ensure that you can have a satisfactory shopping experience.

Safe

The answer is "security". From an information security perspective, privacy is secure. Although it is a second-hand mobile phone, it does not mean that there is a risk of privacy leakage.

Generally, users who sell second-hand mobile phones and Shang Xunchang Zhengjia will quickly empty their own regretful data before selling. After the merchant gets the mobile phone, it will also detect and inspect the mobile phone, and only sell it to other users after confirming that it is correct. There is no need to worry about privacy leakage at all. ”

"My mobile phone has been leaked due to unexpected factors, please don't believe anything about the loan. On May 20, Zhang Han (pseudonym) breathed a sigh of relief after sending this message in the circle of friends.

Not long ago, Zhang Han sold his old mobile phone in the second-hand market, "I didn't expect that the private information in the mobile phone, such as **book, WeChat, **, etc., would be leaked." What Zhang Han doesn't know is that he has obviously restored ** to factory settings, why is the information still being stolen? What worries him now is that he doesn't know how many people now have their information in their hands.

Will second-hand mobile phone trading lead to personal information leakage? Recently, a survey of a number of mobile phone repair merchants found that most second-hand mobile phones can also realize the recovery of private data such as **book and ** after the information is deleted or even restored to factory settings. There are also many online software sellers who sell data recovery software.

Selling old mobile phone information is leaked, who stole your information?

After Zhang Han sold his old phone to a second-hand mobile phone dealer, within a few days, several friends received fraudulent text messages borrowing money in his name. He found that the other party was using the nickname of his friend in his phone's address book. And he had already deleted this information when he sold his phone.

On May 19, Zhang Han's mobile phone rang, and a friend called** to tell Zhang Han that his mobile phone information may have been stolen.

This is the 4th friend of the day to call something similar**. Since two days ago, many friends around Zhang Han have received text messages in his name, most of which claim that they hope to borrow money for emergencies due to tight cash.

The bank card number and name left by the other party are not mine, and at first glance it is a fraudulent text message. Zhang Han said, but what surprised him was that the messages his friends received accurately showed the other party's name.

The other party used a name in the text message that only a few of us buddies knew, which made me almost believe it. On May 21, the reporter contacted a friend of Zhang Han who was harassed, and he recalled to the reporter, "Later, after analyzing it, I found that the names used by the other party were all the names recorded by him." ”

Under the reminder of a friend, Zhang Han realized that the information leak was likely to be on his previous mobile phone. A week ago, Zhang Han sold the mobile phone he used before to a second-hand dealer at a low price because he changed his mobile phone. But when he contacted the second-hand mobile phone dealer again and questioned it, the other party categorically denied his speculation.

**Shang suggested that I recall the operation to see if I accidentally didn't clean up the mobile phone information and took action. But Zhang Han denied this statement, "I clearly remember that the information such as the mobile phone **book, ** and so on were deleted cleanly, and as for Alipay, WeChat and other software, they were completely deleted before they were resold." ”

On May 22, Lin Fei, who has been engaged in mobile phone repair for many years, said, "It cannot be ruled out that there are second-hand traders who use technology to recover the data that customers think they have emptied after the mobile phone, and then transfer it to the" data vendor "for profit." ”

This seems to have been refuted from rumors, not necessarily the fault of second-hand mobile phones.

A second-hand phone only, will not leak privacy. Rest assured, unless your luck is too good, and you just inhale it once like you won a five-million lottery. However, in this probability, the probability is very small, and there is no marriage at all, which is now known.

So when you buy a new phone, you only need to swipe it or restore the factory settings.

Of course, buying a second-hand mobile phone is safe for privacy, because you don't need to show anything to buy a second-hand mobile phone, as long as you buy it.

Buying a second-hand mobile phone, if you buy it in some more regular **, it is still safer. After all, they are all guaranteed and tested. But if it's something that's not too formal, it's not certain, and there may be some plug-ins installed in it to monitor privacy.

Now buying a second-hand mobile phone is also very safe in terms of privacy, so you don't have to worry too much about this problem.

You are buying a second-hand phone, as long as you do a factory reset after buying it, and delete all the data.

Hope, thank you.

There are hidden dangers in buying second-hand mobile phones, you can go to the app to buy second-hand mobile phones, and now you can turn the main second-hand mobile phone business, which looks good, and the security of the platform is still okay, and you can return it if it doesn't work.

Is it safe to buy a second-hand mobile phone? I usually buy a second-hand mobile phone, if it is formatted, the privacy is also relatively safe.

The safety of funds, the quality is not necessarily ***, and whether there is any guarantee after sale.

From different old mobile phone channels: 1. Second-hand mobile phone direct sales platform. If you buy a second-hand mobile phone on the platform, the above three major risks of capital security can be eliminated, and there is no need to worry about the funds, after all, there is a platform endorsement, plus what 7 days no reason to receive the goods, etc.

After-sales still need to pay attention to it, how to say it, after all, the forest is big and there are all kinds of birds, and all kinds of untimely after-sales on second-hand platforms on the Internet occur from time to time. When it comes to quality, the second-hand mobile phone industry is already mixed, which does not mean that the quality of the platform must be guaranteed. There are a lot of unscrupulous merchants who take advantage of platform loopholes and can still play you around!

There is a good saying: the platform does not care whether it is good or bad, but the seller is good or bad. 2. Sellers in physical stores.

The risk of physical stores still exists, the most important thing is that the financial guarantee is insufficient, so those in the same city can trade face-to-face, and those in other places can learn from the circle of friends whether it is an old brand store, and generally more than 3 years of merchants can still be trusted. As for after-sales, regular brick-and-mortar stores provide 15 to 30-day after-sales policies, and the specific needs are consulted clearly. However, there will also be some unscrupulous merchants who just sell their mobile phones to you today and will not admit their accounts tomorrow.

Therefore, when choosing, we must learn more and find reliable merchants, the higher the degree of protection of our rights and interests. 3. Individual sellers. Is this a wide range?

For example, the backpackers we see now, as well as individual buyers on major second-hand mobile phone platforms, etc. So among these individual sellers, I think there are two extreme possibilities for buying a second-hand mobile phone, the first is risk-free: it is indeed a conscientious seller, after all, there must be a reason why you can know him, I don't believe that you will trust a person for no reason?

Then you don't need to worry about this situation, whether it is capital, after-sales, or quality. You give him money, he gives you your phone, you don't have to worry about anything. The second type of full risk:

Some of you transferred money to blacklist you directly, and no one could find it, and some were shoddy, 0 after-sales or something worse. So these are all things to be wary of.

Summary. No, it won't.

Is it safe to use someone else's second-hand phone?

After I finished the college entrance examination, I used my sister's second-hand Apple 11, I logged in my ID, but my sister's email still occasionally pops up and I need to fill in the password, will my sister's mobile phone usage be seen by my sister? For example, the case of a p p**, or the situation of personal consumption.

No, it won't. If you don't post your sister's variety, you won't let your sister see your consumption.

First of all, no matter the second-hand mobile phone you bought, it is sold to you in the original state of the factory, unless you have your own friend's second-hand phone, Apple mobile phone should pay attention to whether the ID account and password are exited, as long as the Android phone is restored to the factory, there is nothing at all, there is no data loss when buying a second mobile phone, and the loss is also the original owner's data that has not been recovered, and it is also the data of the original owner! Don't worry about this!

It means that you withdraw your sister's ID and log in your own ID, and the two have nothing to do with each other, so don't be afraid.

Will her email receive the usage from my side?

No, it won't. Don't log in to his mailbox, the next time it pops up in his mailbox, you can refuse.

And the mailbox does not collect personal information.

The second-hand phone didn't have a factory reset.,Just log in the ID as mine.,But occasionally her email will pop up and ask me to fill in the password.,I borrowed money on Meituan recently.,She won't be notified.。

No, borrowing money will only notify the owner itself.

I didn't write your sister's mobile phone number, how could others know?

Good. Uh-huh.

Rest assured. I won't say that she linked her mobile phone.

No, it won't.

1. There are many ways to identify whether a mobile phone is a refurbished machine, but different brands have differences, taking Apple as an example, there are the following methods:

1. Observe carefully Many assembled or refurbished mobile phones are difficult to distinguish from the naked eye, but they will also leave some clues, such as the screen, in order to control the cost, some rear pressure screens will be used. If you look carefully at the rear pressure screen in the picture above, the black edge of the screen is uneven, wide in some places and narrow in others. Again, there is a part of the rear pressure screen that will have the phenomenon of screen yellowing, and the transparency is not very good.

2. Look at the card slot is to look at the card slot, in the refurbished machine and the assembly machine, some of them will find that the color of the card slot and the fuselage is different. The color is different, which means that the phone case has been replaced.

The appearance can only see some clues, but some renovations have been done in perfect places, at this time we need to disassemble the machine to view, very simple, two screws removed, carefully look at the internal situation, whether there are fingerprints or traces of replacement, the screen to see if there are some other imprints, as shown in the following figure is the replaced screen.

The above problems are assembled and refurbished. Finally, let's talk about the rear pressure screen: that is, the outer glass of the original screen is broken, and then the glass is replaced, which needs to be pressed up with a machine, and the inner screen is original, but it may lead to a series of problems with the screen due to machine operation and other reasons, such as yellowing, insensitivity, screen jumping, etc.

Problems with refurbished machines Second-hand mobile phones change shells and pretend to be brand new **, the quality is very poor, in fact, it is to collect the original movement, shell or outer packaging for repair or processing, and then sell it as a new machine.

The main problems are:

1. The old machine with a problem with the circuit board is repackaged after repair or parts assembly, and the performance of this type of machine is the most unstable;

2. The shell of the normal old machine is sold as a new one after treatment or replacement; Third, the informal channel machine is brushed through software.