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"Factory Reset"

Discussion in 'Android Lounge' started by danwat1234, Oct 15, 2012.

  1. danwat1234

    danwat1234 New Member
    Thread Starter

    Oct 15, 2012
    Does doing a "Factory Reset" actually wipe all the custom data off the internal memory of a phone, or just "Delete" it, as in delete the FAT records for those file but not actually wipe over the data?
    I am going to sell my old Google G2, and did a factory reset, but am not sure if the data has actually been 'physically' overwritten.

    I've looked at wiping apps on the play store, like one called "SHREDroid", but from the reviews it looks to be buggy.
    This is with an un-rooted phone.


    EDIT: Is this:: a necessary or good step to perform after doing the factory reset?
    "settings> sd card and phone storage> tap, "unmount phone storage", then tap "format phone storage"."
    EDIT: Doesn't look like my G2 has that "format phone storage" option, so nvm.


  2. Digital Controller

    Digital Controller The Real Bass Creator

    Sep 5, 2012
    Civil Engineer
    Cincinnati, Ohio
    Hey there Dan, i have a quote from another site that might help you with understanding this :)

    Also welcome to the forums :D:D

  3. danwat1234

    danwat1234 New Member
    Thread Starter

    Oct 15, 2012
    Thanks Digital Controller.

    the Storage-->Erase SD card
    privacy-->Factory data reset-->Erase SD card checkbox

    Neither button wipes the SD card (The external memory card).
    It doesn't take any more time for it to 'erase' a full 8GB SD card versus a nearly empty 1GB SD card.

    I plug the 'erased' card into my computer, and it has done the equivalent of a format. The partition on the SD card is nearly empty except for a few default folders that the phone created.

    I load up my recovery software called "Recover My Files" and do a full scan and it finds all the files that were on the card and I'm able to copy them off to a folder on my computer's hard drive.

    Erase? Nope. Wipe? Nope. But perhaps the factory data reset does wipe the internal phone flash memory, though I'm guessing not since it does it in 1 minute or less. I'm sure it's not a DoD 5220.22 government level wipe at any rate.

    So before you give away your SD cards, use "KilDisk" or similar to really wipe the card! Doing "Erase SD card" on the phone does nothing to destroy the data on the card.

    And beware that the new owner of your phone might root it and then possibly use recovery software to recover some of the data that was on the phone when you owned it!

    This is with a Google G2, Android 2.3.4. Perhaps Android 4.0/4.1 actually wipes, who knows.

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