Hard Reset LG K4 Note A7010a48

First method:

1. At first switch off your cell phone by holding the Power key for a short while.
2. Then hold down the Volume Down and Power button together for a couple of seconds.
3. When the LG logo is displayed, let go of the Power key, keep pressing the Volume Down and then press once more the Power button.
4. Afterwards you should see a factory reset menu on your screen.
5. Confirm process by choosing appropriate options using Volume rockers to navigate and Power button to confirm.
6. Now your phone should restart.
7. Success! The hard reset has just been completed.

Second method:

1. The device must be turned on, so hold down the Power button for a short while.
2. In the next step go to Settings.
3. Select General and then Backup & Reset.
4. Afterwards tap Factory Data Reset and Reset Phone.
5. Choose Erase Everything if you are sure you want to clear all your data. 
6. Then select OK to confirm the whole operation.
7. Success! Your phone is ready to use.

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