In order to hard reset a Motorola KRZR K3, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Motorola KRZR K3 device will be brought back to the default configuration of a brand new device.
1. Press Power button until the phone turns on.
2. Open Main Menu > Settings > Initial Setup > Master Reset.
3. Next, enter the lock code - either 0000 or 1234.
4. Confirm with Left Softkey. Your phone will now reset and restart. Grats.