Will. JD。 COM's recycled mobile phone leaked the original mobile phone information?

For the old mobile phone that has been replaced, some users will transfer it to relatives and friends; Some will be resold to the second-hand market. Of course, users will delete personal information before changing hands. However, most methods of deleting information are relatively simple, that is, selecting it first, then clicking Delete to finish it, or formatting it. It should be noted that personal information deleted in this way can actually be recovered by technical means. Therefore, even if the private information such as address book, SMS, photos and WeChat chat records on the mobile phone are completely deleted, the factory settings are restored, and even the memory card is formatted, people with ulterior motives may still recover the data in the mobile phone.

In order to prevent privacy leakage caused by data recovery in the mobile phone, users can fill the storage space of the mobile phone with videos, photos, junk files or invalid information without personal information before dealing with the old mobile phone. Then delete the information, repeat this several times, and the mobile phone will be occupied by useless information. Finally, format the mobile phone to clear all information and data. After such processing, the storage space of the mobile phone is repeatedly covered. Even if the data is recovered by technical means, it can only read the information covered by the top layer, which is useless and naturally will not reveal personal privacy.