The mobile phone is restored to the factory setting WeChat.

If the mobile phone is sold after the factory settings are restored, there is also the risk of information leakage. The reporter's investigation found that deleting files or even restoring the factory settings of mobile phones can't effectively delete files. Users should pay special attention to the safety of personal information when dealing with old mobile phones. The following are the factory settings of the mobile phone I arranged for you, hoping to have some effect on you.

It is difficult to completely erase the mobile phone information.

Most people will choose to sell their second-hand mobile phones in the second-hand market. Before selling old mobile phones, most people will delete photos, text messages, address books and other contents in their mobile phones, and some will directly restore their mobile phones to factory settings. In this case, has the information in the old mobile phone been cleared? After understanding, the reporter found that conventional deletion or even restoration of factory settings could not completely delete the information on the mobile phone.

According to mobile phone technicians, the information storage method adopted by smart phones is similar to that of computers. When the user deletes, the information in the storage medium is not actually erased, but is marked as rewritable. When new information is stored, the original information can be overwritten, but when it is not overwritten, the information remains in the storage space. At this time, you can easily restore this information by restoring the software, even if it is "restoring factory settings". Recoverable information includes: photos, short messages, WeChat chat records, address books, audio recordings, videos, etc.

Can recover data and steal information.

360 mobile phone security experts told reporters that at present, some cases of property losses caused by mobile phone users leaking privacy due to changing their mobile phones have been collected. Some criminals first recover the messages, chat records, photos and other information in the user's mobile phone to obtain the user's name, ID number, mobile phone number and other information, and then reissue the SIM card through a fake ID card, and then directly obtain the user names and passwords of some login accounts of the user.

The reporter saw on Taobao that some sellers are selling software that can recover mobile phone data, and the price ranges from 10 yuan to 40 yuan. As long as the mobile phone data is not stored repeatedly after being deleted, it can be recovered. In major electronic stores, there are also many booths with the signboard of "mobile phone data recovery". It is understood that the current recovery of mobile phone data does not require any proof of mobile phone ownership.

360' s security experts said that 360' s newly released "safe replacement" software has the function of "privacy shredder", which can completely erase the information in the mobile phone. In addition, technicians said that users can also use the "indigenous method" to avoid data leakage, that is, filling the mobile phone memory with large-capacity movies, and it will be difficult to recover the original data after repeated several times.