Implementing the pedometer to count step with Unity3d

I have tried to implement a pedometer with Unity3d in C# language. The code below is my code which I learn from http://answers.unity3d.com/questions/160106/implementing-a-psuedo-pedometer.html

I test this code with the accelerometer frequency of 30Hz.

I have some problems with the accuracy of this pedometer. When I try to test it in my skinny jean pocket, the step count doesn't work at all. Anyone here please help me to find the solution. Thank you very much :)

 private float loLim = 0.005F;
 private float hiLim = 0.3F;
 private int steps = 0;
 private bool stateH = false;
 private float fHigh = 8.0F;
 private float curAcc= 0F;
 private float fLow = 0.2F;
 private float avgAcc;
 
 public int stepDetector(){
     curAcc = Mathf.Lerp (curAcc, Input.acceleration.magnitude, Time.deltaTime * fHigh);
     avgAcc = Mathf.Lerp (avgAcc, Input.acceleration.magnitude, Time.deltaTime * fLow);
     float delta = curAcc - avgAcc;
         if (!stateH) { 
             if (delta > hiLim) {
                 stateH = true;
                 steps++;
             } else if (delta < loLim) {
                 stateH = false;
             }
             stateH = false;
         }
         avgAcc = curAcc;
         calDistance (steps);
 
     return steps;
 }