Android



If your phone is fully functional (you haven’t messed up something while playing with custom ROMs, for instance), all it takes is:

 1. Go into Settings -> ‘Backup & Reset’
2. Select ‘Factory data reset’
3. Then tap on ‘Reset phone’
4. Finally, touch ‘Erase everything’ and wait a few minutes until it’s all done. That’s it!


In case your smartphone is not starting up properly, you’d need some other tactics. Do the following:

1. Power your gadget off.
2. Hold down the Volume Down key and the Power/Lock key simultaneously for a few seconds. (This way you ‘fastboot’ your Android device)
3. After letting go, you’d see a menu with several options. Navigate using ONLY the volume down key. Go to ‘Factory’ and select it by pressing the volume up key. Your phone will do the rest of the magic, and will restore itself to factory settings in just a few minutes.

I-Phone



1. Go into ‘Settings’ and select the ‘General’ tab
2. Next, you’ll see many options, but what we’re looking for here is to ‘Erase All Content and Settings’
3. Tap on it and confirm your intentions to wipe all iPhone data clean.
4. Your iPhone will start doing its magic and in a few minutes it will reboot completely clean and fresh, as if it was just out of the factory floor.

Windows Phone



1. Go into ‘Settings’ and scroll down to the ‘About’ tab. Select it.
2. There, you’d see a ‘reset your phone’ button.
3. Just tap on it, and confirm that you indeed want to delete all of your data.
4. A short wait of just a few minutes, and you’d have a factory reset phone. 

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