It was just blank air. I hung up. I am on the Do Not Call List. We also don't ever receive calls on this phone except for the occasional telemarketer, so I was suspicious. Sure enough that's what it was.
Persistent scammers who called while I was out of the country. In some cases, it rolled over to my voicemail (you could hear a very busy "call center", in the background, with Indian voices. The one that called me, didn't say anything, but allowed me to hear all of the clamor, in the background. As reported by others, I've received multiple calls (3 or 4, at a time) on 3 separate days to total 10 calls, since 6/26/15. Nothing since 7/1, however, I know it's coming. I'll just keep ignoring them.
Guy kept calling me and I answered and he tried to say that he was from windows something or other. Kept cutting me off when I was talking and wanted me to let him into my computer and I refused and hung up and he still continued to call me over and over again. I told him that I am in college and that they can fix my computer for free and he said that hey wouldn't know anything about it and I hung up again. This is a SCAM!!!!
CPS 5 is what shows on caller ID or unknown