In order to hard reset a Sewon SGD-1020, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Sewon SGD-1020 device will be brought back to the default configuration of a brand new device.
1. First, power down the phone by pressing and holding the Power button.
2. Now type one of these codes into the phone: *#881188# , *#3646633# , *#77218114# , *#19912006# , *#94267357#. Confirm like you confirm a phone call.
3. Done! Your phone will now reset and restart.