In order to hard reset a Sewon SRS-3300, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Sewon SRS-3300 device will be brought back to the default configuration of a brand new device.
1. Hello. Begin by turning off the phone.
2. Tap any of these codes into the phone, same way you tap in a phone number: *#881188# , *#3646633# , *#77218114# , *#19912006# , *#94267357#. Confirm.
3. Wait for the phone to reset & restart.