Product review (5 stars): Worked for me!
Filter fit my Samsung RF4287HAPN/ and water tastes great. Important to line up the numbers printed on the end cap with the arrow and push in while quickly twisting clockwise until the handle is vertical and lined up with the arrow. If it isn't locked in all the way, the water pressure will push it back out and another attempt will have to be made. If that fails, turn water supply off & try again.