How to wipe Android Phone or Tablet with Shredit Android – Option 1: Factory Reset then Shred

When you want to wipe your Android phone so it can’t be recovered, you need to do an extra step after doing a factory reset. That’s because there is an important difference between wiping your android phone instead of just deleting the data. When you delete private data or private apps from your phone, the data is still on your phone, in your free space until that part of your storage is overwritten by something else. Seeing as you don’t know when that will happen, you can ensure that this isn’t recovered by someone else by wiping it.

Shredding (secure delete) is a way to permanently delete the data on Android and is often done by people before selling their phone. So, when you want to wipe your phone before selling, shred it after doing a Factory Reset.

In order to wipe your Android phone or other device completely, follow these instructions.

Click to watch the video

How to wipe Android Phone, Tablet, TV Box – Factory Reset, then Wipe

Time needed: 1 hour and 15 minutes

When you plan to wipe everything, you can do a factory reset and then wipe. Here’s what you do:

  1. Write down your account information!

    Very Important Step. Make a note of the Google Account (gmail address) and the Google Account password for the device you want to wipe. Make sure you can log in to this account before continuing. You’ll need this when you try to add the account back onto the device after you’ve done a Factory Reset.  (For Android Help, see Technical Notes after these instructions.)

  2. Do a Factory Reset.

    For help, Check the User’s Manual for your device. In addition, see Technical Notes after these instructions.

  3. Add your Google account back onto the Android Device.

    For Android Help, see Technical Notes after these instructions.

  4. Install ShredIt

    Go to the Google Play Store and install ShredIt. Click here to go to the Install Tutorial.

  5. Launch Shredit – Android.

  6. Configure. (Optional)

    Govt Standard Shredding – Click to comply with DoD 5022.22M Sanitize Standard or DoE Standard
    Number of Overwrites – Choose the number of overwrites
    Overwrite Pattern – Choose the Overwrite Pattern
    Shred Location: – Choose the Storage Location Internal and | or External Storage (either or both)

    Shredit Wipe Android Phone - Change Settings (optional)

  7. From the Shred screen, Click “Shred.

    Shredit Wipe Android Phone - Start Wiping

  8. You can watch the progress on the Shred screen.

    Shredit Wipe Android Phone - Monitor your Progress

  9. Uninstall ShredIt

    If you’re selling the phone, uninstall Shredit – Android in the Google Play Store.
    Next, delete the Google Account (gmail address) from the device.

    Once you’ve uninstalled Shredit for Android from your device, you can install it on a new device from the Play Store by adding that same Google Account to your new device. (For Android Help, see Technical Notes after these instructions.)

Technical Notes

Android Help

How long will it take to wipe the free space?

To wipe the free space on the device will take 1.35 minutes per gig for a one-pass overwrite.

In order to estimate how long the job will take, go into your Android settings to determine the available space on your Android device. (Settings > Device > Storage > Available space)

Then, multiply that by 1.35

  • For example, if you have 10 gb of Available storage, then it will take about 13-14 minutes to wipe the free space.
    10 x 1.35 = 13.5 minutes
  • For example, if you had done a Factory reset and then were wiping a 64 gb phone, in would take about an hour and ten minutes. (By comparison to do a Factory Reset on a 64gb phone will take less than 15 minutes.)

What if I do more than one pass?

Each pass will add to the time it takes to wipe the free space.

  • For example, if you have 10 gb of available storage and you were doing 5 passes, then it will take about 67-68 minutes to wipe the free space.
    10 x 1.35 x 5 = 67.5 minutes

Wipe phone or use encryption?

Although using encryption enhances security, it may not be “good enough” as the BBC reports in this article about data retrieval, British spies ‘moved after Snowden files read’


Where to get additional Help

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