Coolpad India — displaying horizontal lines across the screen

Address:

Kolar, Karnataka, 563101

Sir, i'm facing grid horizontal lines across the screen and it is give trouble to handle phone. Kindly provide solution for remove the grid line across the screen.
From last few days i am facing this problem and try to solves problem my end but it is not possible. Grid horizontal lines are give too much problems to handle the mobile phone. Please look into this matter as soon as.