I'm an Android user and want to sell mobile phones. Prior to sale all the data has been deleted but when checked again turns the data can still be recovered. The question is whether the recovery can be removed so that there is no such file again.
Answer:
Technically, with the right tools such as Cellebrite, the data on the smartphone and memory card that has been removed (factory reset) though can still be recovered.
But the study of the action of the virus encrypts data Cryptolocker victim and could not be recovered without the proper key, there are tricks that can secure your smartphone data from data recovery action usually use a tool such as Cellebrite. And incredibly, this trick is more powerful than a factory reset which sometimes leaves the data to be recovered.
The trick is to do the encryption on your device in order to encrypt the data on the smartphone. This process will take some time (a few hours) because all data are encrypted one at a time.
Make sure the device you do not run out of battery when the encryption process is in progress, the device should be plugged into the charger to make sure not to lose power during the encryption process. After the encryption process is complete, do a factory reset to restore the device to the initial setting.
If you want to choose to use apps (Android), there are several apps that can be found on Google Play as Secure Deletion for Android, Secure Erase and Secure with iShredder 3 Wipe.
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