how to hard reset Nokia Lumia 520

Nokia Lumia 520 is Nokia smartphone family with Windows Phone 8 operating system. For everyone who love to use or try to taste the Microsoft Windows Phone 8 os will like to use this Nokia Lumia 520.
The main Advantage specifications of Nokia Lumia 520:
LCD 4 inchi
Processor Dual Core 1Ghz
Memory Internal 8GB ROM with 512 RAM
External memory slot MicroSD upto 64GB
Camera 5 MP, autofocus,
Operating System Microsoft Windows Phone 8
Battery Li-Ion 1430 mAh
How to Master Reset Nokia Lumia 520 to Factory Default ?
Nokia Lumia 520 use Microsoft Windows Phone 8 as the operating system. With this OS we can do many feature in Nokia Lumia 520 also we can add more applications to fit what we need. But sometime the Nokia Lumia 520 get hang or stuck or freezing or brick or not responding when we use to do something. The other problem is LCD is not responsive while touch the applications or menu. We are recommended to do soft reset by turning off the Nokia Lumia 520 with the power button to remove the cache or temporary files which can make the Nokia Lumia 520 not run properly. If the problem still appear, then we can try to do the hard reset with easy step in bellow:

#Option 1, How to Hard Reset Nokia Lumia 520 with Setting Menu:
Please remember to backup your important data before doing the hard reset to factory default, because all data and installed applications will be erased.

1. Turn on the Nokia Lumia 520
2. Make sure the battery is fully charge or not empty
3. Go to menu: Setting > About > Reset Your Phone
4. The process of formatting Nokia Lumia 520 will do by it self

#Option 2, How to Hard Reset Nokia Lumia 520 with Hardware Button Key:
If we can not access the menu or stuck or not responding, then we can try format Nokia Lumia 520 with hardware key:
A. BIG STEP ONE:

1. Please remember, we have to do two BIG STEP
2. BIG STEP ONE (a). Press and Hold the Power Button, do not release until the phone vibrate (if you feel the vibrate in Nokia Lumia 520 then release the Power Button)
3. BIG STEP ONE (b). Press and Hold the Volume Down Button, do not release until the LCD show the exclamation mark (if you see the exclamation mark in LCD, then release the Volume Down Button)

B. BIG STEP TWO (this can be down after all BIG STEP ONE finish)

1. To continue reset, you have to do the last step bellow
2. Press Volume Up Button Key and release
3. Press Volume Down Button Key and release
4. Press Power Button Key and release
5. Press Volume Down Button Key and release
6. The the Nokia Lumia 520 will do the hard reset format

FAQ Nokia Lumia 520:
What to do if I forget Security Key Password Code Nokia Lumia 520 ?
If you forgot Nokia Lumia 520 pin password code, you have to do the hard reset with the step above. Please keep in good place your password of Nokia Lumia 520

What is the Secret Code Key for Hard Reset Nokia Lumia 520 ?
Until this tutorial created, it does not have secret code for hard reset Nokia Lumia 520, please tell us if you have this information, we will update it soon. But the most easy way to hard reset Nokia Lumia 520 is by doing the steps above