Motorola Solutions — Font Color

Address:	Bangalore, Karnataka, 562106
Website:	www.motorola.in

I brought moto g4 plus 2 weeks back. The problem is the font color was ok when I brought the device but from 1 week it has changed to black with white background. I checked with my friend who has the same device but it has the same font. I cant read many messages in my whatsapp.. There is no differece in the colors. So please tell me what's happening with my mobile and how to resolve this problem.