Screen of Micromax A90 android phone going black when receiving calls

While receiving calls on my Micromax A90 android phone now a day, the screen of the device is going black. I am not intimated about any actions happening on my gadget during calls. In what way I can fix this problem?

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Hello friend
THis a problem of some software error and you should have to fix it.
Here are some suggestions
1.Try to see if the settings with the call are properly figured and it is not wrong
2.Check if the sensor is working fine
3.If everything is fine then try to rebboot your device and see if the problem is fixed or not or you can restore the factory setting by going in the privacy option in settings and then getting it doen there.
Hope it may solve your problem.
thank you

Your micromax a90 is effected by virus, which is causing such trouble. As in general that thing might not happen because it is not the general functioning of the phone. So there are two solutions for this problem. >1. Firstly you better install the antivirus to remove the virus. There are many antiviruses available which you can download. After downloading it install it in your phone and scan for virus. >2. Now the second solution is you better factory reset your phone so that all the virus is deleted and new operating system is installed. Which might do the thing. Hope this helps.