Terrain texture pixelated,Terrain texture pixelated on mali400

Hi,
I am using Unity 2018.4.3f1
Problem is, in some android devices terrain texture is pixelated
One of them have gpu mali400

I used custom shader to solve this problem, but that shader don’t have support of lightmap.,Hi,
I am using Unity 2018.4.3f1, terrain texture is pixelated on some devices one of them have gpu mali400.
I used custom shader to solve this but that shader don’t have support of light map.

How I can solve this ?

You can make changes in Texture Quality section to get desire details.