I have the same problem as many others but I cant find a answer that works.
I export my animation and model and rig and all as FBX from blender.
I then import that into Unity.
The UV seem to be corrupt.
watch clip :
If I export as OBJ from blender, the UV is working but my animation is not exported with it.
How to fix… anyone?
Anyone have any idea whats wrong?
Or should I just forget about the FBX and find out how to export animation with OBJ instead?
Hello, anyone? 
I had forgotten to apply the scale, location, rotaion to the model!
How do you apply the scale, location, rotaion to the model on unity to fix the uvs, im having the same problem atm.
I only know how to in Blender.
In Blender you select the mesh and press CTRL+A to get up the Apply menu, then just choose Location, then Rotation and then Scale from that menu.
ill try that thanks
no luck but i’ll try something different, thanks for the help anyways.