Mobile Tilt Problem

Hello, i’m creating FPS game for mobile
but i have little problem in my code
that if i want to look right or left
i must tilt the phone like the Car Steering wheel
i dont need it that way
i want to rotate the phone in x axis

sorry my english is bad
this photo may explain what i want

rotationX +=  Input.acceleration.x   * sensitivityX;
			rotationX = Mathf.Clamp (rotationX, minimumX, maximumX);
			
		//	transform.localEulerAngles = new Vector3(0,rotationX, 0);
			transform.rotation = Quaternion.Euler(0, rotationX, 0.0f);

i hope someone can help me
or guide me to the right way

This video might help you.

Check out this Unity Question as well.