OIS stands for "Optical Image Stabilization" and is used in the camera of the Samsung Galaxy S6 to prevent blurry images. If your case your Samsung Galaxy S6 have concerns about whether the OIS camera works properly, then you can do this quickly find out a little test.
For this please open on the Samsung Galaxy S6 the service menu of Samsung:
Navigate to the Phone app and this on the keypad. Give here now the following code so that the service menu is displayed: * # 0 * #
So you see different tiles, all of which are filled with information on your Samsung Galaxy S6. Typing Click on the tile with "Sensor". Showing you now spent all sensor data of Samsung Galaxy S6, which are currently available. Small tests Further can be used to check the function of the sensor. In order to test the OIS the Samsung Galaxy S6 scroll down a bit to your "OIS Gyro" see. Underneath is a button with "Gyros Self Test". Typing on this and your Samsung Galaxy S6 checks the OIS camera.
If everything seems fine with the OIS the Samsung Galaxy S6: Pass
Anything wrong with the OIS the Samsung Galaxy S6 not appear: Fail
We hope that "PASS" appears as a result of the test with you. If FAIL appears, then please accept your warranty service.