This is not working!

This is my outline shader, which i am using, it doesnt seem to work in android after building it.

the shader: Shader "Hidden/OutlineEffect" { Properties { _MainTex ("Base (RGB)", 2D) = "white" {} _LineColor ("Line Color", Color) = (1,1,1,.5)

     }
     SubShader 
     {
         Pass
         {
             Tags { "RenderType"="Opaque" }
             LOD 200
             ZTest Always
             ZWrite Off
             Cull Off
             
             CGPROGRAM
 
             #pragma vertex vert
             #pragma fragment frag
             #pragma target 3.0
             #include "UnityCG.cginc"
 
             sampler2D _MainTex;
             sampler2D _OutlineSource;
 
             struct v2f {
                float4 position : SV_POSITION;
                float2 uv : TEXCOORD0;
             };
             
             v2f vert(appdata_img v)
             {
                    v2f o;
                 o.position = mul(UNITY_MATRIX_MVP, v.vertex);
                 o.uv = v.texcoord;
                 
                    return o;
             }
 
             float _LineThicknessX;
             float _LineThicknessY;
             float _LineIntensity;
             half4 _LineColor1;
             half4 _LineColor2;
             half4 _LineColor3;
             int _FlipY;
             int _Dark;
             uniform float4 _MainTex_TexelSize;
 
             half4 frag (v2f input) : COLOR
             {    
                 float2 uv = input.uv;
                 if (_FlipY == 1)
                     uv.y = 1 - uv.y;
 
                 half4 originalPixel = tex2D(_MainTex,input.uv);
                 half4 outlineSource = tex2D(_OutlineSource, uv);
                                 
                 float h = .95f;
                 half4 outline = 0;
                 bool hasOutline = false;
 
                 half4 sample1 = tex2D(_OutlineSource, uv + float2(_LineThicknessX,0.0) * _MainTex_TexelSize.x * 1000.0f);
                 half4 sample2 = tex2D(_OutlineSource, uv + float2(-_LineThicknessX,0.0) * _MainTex_TexelSize.x * 1000.0f);
                 half4 sample3 = tex2D(_OutlineSource, uv + float2(.0,_LineThicknessY) * _MainTex_TexelSize.y * 1000.0f);
                 half4 sample4 = tex2D(_OutlineSource, uv + float2(.0,-_LineThicknessY) * _MainTex_TexelSize.y * 1000.0f);
                 
                 if(outlineSource.a < h)
                 {
                     if (sample1.r > h || sample2.r > h || sample3.r > h || sample4.r > h)
                     {
                         outline = _LineColor1 * _LineIntensity * _LineColor1.a;        
                         if (_Dark)
                             originalPixel *= 1 - _LineColor1.a;
                         hasOutline = true;
                     }
                     else if (sample1.g > h || sample2.g > h || sample3.g > h || sample4.g > h)
                     {
                         outline = _LineColor2 * _LineIntensity * _LineColor2.a;
                         if(_Dark)
                             originalPixel *= 1 - _LineColor2.a;
                         hasOutline = true;
                     }
                     else if (sample1.b > h || sample2.b > h || sample3.b > h || sample4.b > h)
                     {
                         outline = _LineColor3 * _LineIntensity * _LineColor3.a;
                         if (_Dark)
                             originalPixel *= 1 - _LineColor3.a;
                         hasOutline = true;
                     }
                 }                    
                     
                 //return outlineSource;        
                 if (_Dark)
                 {
                     if (hasOutline)
                         return originalPixel + outline;
                     else
                         return originalPixel;
                 }
                 else
                 {
                     if(hasOutline)
                         return originalPixel + outline * _LineColor1.a;
                     else
                         return originalPixel;
                 }
             }
             
             ENDCG
         }
     } 
     FallBack "Diffuse"
 }