In order to hard reset a Sony Ericsson Z300, you should perform the following steps.

Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Sony Ericsson Z300 device will be brought back to the default configuration of a brand new device.


1. Turn on the phone.

2. Select Menu > Settings > General > Master Reset.

3. Continue by confirming and following the on-screen instructions.

4. Voila, the phone should now reset and restart.