Thank you Teresa V. for your reply. However, capable or not, those contacts were there before I installed Avast. Plus, I never had that problem before Avast. Is it possible that Avast mistook the contacts for a virus. Or that a text/e-mail from these people may have had a virus and/or malware attached and that's how they could have been deleted? As I said in my review of Avast, there's a lot more weird stuff going on with my phone since I installed the app that WASN'T THERE before I installed Avast. This is just one example.