In order to hard reset a Samsung R640 Character, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Samsung R640 Character device will be brought back to the default configuration of a brand new device.
1. Hello. Start by turning on the phone.
2. In order to continue, tap in this code: *2767*3855#
3. Wait for your phone to reset and restart.