Why cant i answer calls but can call out?

[Mrs_pepper]

I have a blu bold like us duel sim and one night I decided to reset my entire phone (delete all photos and apps) well added all my info stuff at start up and I had an incoming call but when I would try to answer, phone would shut off like its dying but go back to main screen. I can call out and receive text messages. Only way I know who is calling us if I notice someone us calling and I call them back. Help.

 

[B. Diddy]

Welcome to Android Central! Which Blu phone? "Bold Like Us" is Blu's slogan.

Does this happen in Safe Mode as well? How to turn on safe mode on Blu Studio 5.0