To begin with the master reset of the Nokia Lumia 530, you will first need to turn off the device
After it is switched off, press and hold the power button until the device vibrates. As soon as the device vibrates, release the power button and followed by pressing and holding the volume down button until an exclamation mark appears on the screen.
Next, when the exclamation mark is still on the screen, press the following buttons in the exact sequence written below
Volume up button, volume down button, power button and volume down button.
By completing the above, the Nokia Lumia 530 will begin rebooting and when it’s rebooted, all the settings of the device will be back to the way it originally is.