How to Manually Flash/Reset your Android phone (especially when you forget your password/pattern)

Its simple. It just need a hard format and all your factory would be restored back.
remember to take-off your memory card first, switch off your device, then You will need to press and hold the buttons for a few seconds. Some of the more common button combinations include:
=>Volume Up + Home + Power
=>Volume Down + Power
=>Home + Power.

Make sure u try any of these buttons and hold them constantly,
Once the recovery menu opens, you can navigate the menu with the volume buttons. You may need to open the Recovery menu to find the Factory Reset mode.

Use the Power button to select your menu options.
You will be asked to confirm the factory reset.
Wait for the restore process to compete. After your phone resets, it will be set back to factory defaults and will be like it just came out of the box.

If you have any other problem, comment below