These codes can we use to see the hidden settings which is not even possible by simple apps.
IMEI Number is an unique number of your device, it can be used to trace your mobile location.
Whenever you need to check the battery percentage use this Samsung code. This will inform you the battery level and save your life.
To inspect the Samsung hardware you need to use this code. Whenever you need to check an hardware issue, use this code.
To inspect the Samsung Software you need to use this code. When ever you need to update Software/ firmware, use this.
To update Samsung camera you need to use this secrete code. Updating your camera is also important if you are a photo lover.