BLENDWEIGHTS and BLENDINDICES don't have effect in Google Pixel phone

I use BLENDWEIGHTS and BLENDINDICES in vertex Attributes, transform vertex position in vertex shader.
It's ok in Editor, but no effect in phone.

Code (CSharp):

1. struct Attributes
2. {
3.     float4 positionOS    : POSITION;
4.     float3 normalOS      : NORMAL;
5.     float4 tangentOS     : TANGENT;
6.     float2 texcoord      : TEXCOORD0;
7.     float2 lightmapUV    : TEXCOORD1;
8.     float4 weights       : BLENDWEIGHTS;
9.     int4 indices        : BLENDINDICES;
10.     UNITY_VERTEX_INPUT_INSTANCE_ID
11. };
12.  
13. Varyings LitPassVertexSimple(Attributes input)
14. {
15.     Varyings output = (Varyings)0;
16.  
17.     UNITY_SETUP_INSTANCE_ID(input);
18.     UNITY_TRANSFER_INSTANCE_ID(input, output);
19.     UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
20.  
21. #ifdef _SKIN
22.     input.positionOS = mul(_Bones[input.indices[0]], input.positionOS) * input.weights[0] +
23.         mul(_Bones[input.indices[1]], input.positionOS) * input.weights[1] +
24.         mul(_Bones[input.indices[2]], input.positionOS) * input.weights[2] +
25.         mul(_Bones[input.indices[3]], input.positionOS) * input.weights[3];
26.  
27.     input.normalOS = mul((float3x3)_Bones[input.indices[0]], input.normalOS) * input.weights[0] +
28.         mul((float3x3)_Bones[input.indices[1]], input.normalOS) * input.weights[1] +
29.         mul((float3x3)_Bones[input.indices[2]], input.normalOS) * input.weights[2] +
30.         mul((float3x3)_Bones[input.indices[3]], input.normalOS) * input.weights[3];
31.  
32.     input.tangentOS = mul(_Bones[input.indices[0]], input.tangentOS) * input.weights[0] +
33.         mul(_Bones[input.indices[1]], input.tangentOS) * input.weights[1] +
34.         mul(_Bones[input.indices[2]], input.tangentOS) * input.weights[2] +
35.         mul(_Bones[input.indices[3]], input.tangentOS) * input.weights[3];
36. #endif
37.  
38.     VertexPositionInputs vertexInput = GetVertexPositionInputs(input.positionOS.xyz);
39.     VertexNormalInputs normalInput = GetVertexNormalInputs(input.normalOS, input.tangentOS);
40.  
41.     half3 viewDirWS = GetCameraPositionWS() - vertexInput.positionWS;
42.     half3 vertexLight = VertexLighting(vertexInput.positionWS, normalInput.normalWS);
43.     half fogFactor = ComputeFogFactor(vertexInput.positionCS.z);
44.  
45.     output.uv = TRANSFORM_TEX(input.texcoord, _BaseMap);
46.     output.posWS.xyz = vertexInput.positionWS;
47.     output.positionCS = vertexInput.positionCS;
48.  
49. #ifdef _NORMALMAP
50.     output.normal = half4(normalInput.normalWS, viewDirWS.x);
51.     output.tangent = half4(normalInput.tangentWS, viewDirWS.y);
52.     output.bitangent = half4(normalInput.bitangentWS, viewDirWS.z);
53. #else
54.     output.normal = NormalizeNormalPerVertex(normalInput.normalWS);
55.     output.viewDir = viewDirWS;
56. #endif
57.  
58.     OUTPUT_LIGHTMAP_UV(input.lightmapUV, unity_LightmapST, output.lightmapUV);
59.     OUTPUT_SH(output.normal.xyz, output.vertexSH);
60.  
61.     output.fogFactorAndVertexLight = half4(fogFactor, vertexLight);
62.  
63. #if defined(REQUIRES_VERTEX_SHADOW_COORD_INTERPOLATOR)
64.     output.shadowCoord = GetShadowCoord(vertexInput);
65. #endif
66.  
67.     return output;
68. }

 

I have solved