Why model in mobile looks black

This is my model sai computer electro stall - 3D model by stall (@Atek.Digi) [6047997] - Sketchfab

On the desktop it looks perfect, I have check-in 4 mobiles it looks perfect but in 1 mobile, as soon the model load all texture are visible when it’s on the rest all the texture looks black when I rotate or zoom little the texture is visible little. any suggestion or help on what’s going wrong. Thanks

It looks good for me, perhaps your textures were still processing? There’s some overlapping/fighting geometry in the gray wall by the way: