Why doesn't my Android Blu phone doesn't show you an icon to answer incoming calls

[Conrad Little]

I have been trying for over a month but still can't answer incoming calls on my phone. No matter what I do it rings but no answer icon. My teenage grand kids are unable to help as well

 

[Rukbat]

Have you brought the phone into your carrier and asked for assistance?

Or contacted Blu tech support at 1-877-602-8762 or https://bluproducts.com/contact/support/?