ASTC OpenGL ES 3
8x5 Unorm Linear - ANM/NM/MISC/RM/MASK
8x8 Unorm sRGB - BC
6x6 Unorm Linear - CM/NM/Non pbr color texture
A8 Unorm Linear - CM(normal way) and in theory MISC without emissive
name.hd.astc.pvr - single resolution
name.astc.pvr - hd res/2 + full mip mapping
You can just use name.astc with og res and throw away name.hd but please think about weak devices
BC - convert to TGA then in PVRTexTool
If you can't open BC then use Nvidia Texture Tools to convert it to TGA
If PVRTT still shows "red" colored texture then either download 5.1 version or convert it to tga
For ANM/NM/MISC/RM/MASK use PvrTexTool channel editor 
if you can't find it then press invisible button 
or drag tool bar to top 
With Alpha:
Channels RGBA to A-A-A-G
Without Alpha(its content in RED):
Channels RGBA to R-R-R-G
CM:
Blitz method:
A8: convert to A8 OpenGL
L8: convert to ASTC then G-G-G-G and A8 OpenGL
ASTC method:
A8: convert to ASTC
L8: convert to ASTC then G-G-G-G
DX11 A8/L8 to BC3 Unorm Linear:
A8: convert to BC3 Unorm Linear
L8: convert to BC3 Unorm Linear then G-G-G-G
BC3 to Android:
convert it to A8 or ASTC
How to make pc remodeling textures work on android always:
1.Textures of same type, except tracks, should be combined including UVs
2.Give combined texture a name from vanilla blitz or it won't accept it
How to install mod without it: pack it into APK without dvpl format
Texture looks like chess plate(missing textures)? Probably name issue
Very dark unlike pc? Check alpha