In order to hard reset a Samsung A300, you should perform the following steps.

Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Samsung A300 device will be brought back to the default configuration of a brand new device.


1. Power up the phone with the Power button.

2. Type in this code, *2767*3855#, and confirm it using Call button.
3. Your phone should now reset and restart. Done.