Hard Reset SAMSUNG T677A Galaxy View 18.4"

First method:

1. Firstly, switch off the device by holding Power key.
2. Secondly, press and push Volume Up and Power button for a couple of seconds.
3. Stop holding keys if only you see Samsung Logo appears on the screen.
4. Afterwards select "wipe data / factory reset" by using Volume buttons to navigate and Power key to confirm.
5. In the next step choose "Yes -- delete all user data" by using the same keys as before.
6. In this menu select "reboot system now" and the operation will be completed for a short while.
7. Excellent!

Second method:

1. Use the Power button to switch off the device.
2. After that go to Settings and then select Backup&Reset.
3. Now choose Factory Data Reset and Reset Devive.
4. Choose Erase Everything if you are sure you want to clear all your data. 
5. At last select OK to confirm the whole operation.
6. Great! You are performed Hard Reset operation.

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WARNING !
Hard Reset will erase all of your data
All described operations you are doing at your own risk.