The FCC has been warning people about a new phone scam tactic that is becoming increasingly popular

The way it works: the scammers will call the victim and immediately ask, "Can you hear me?" and record the victim saying "yes." With that recording they'll then use it to make fraudulent charges at financial institutions pretending to be the victim.

According to the FCC the best defense against this scam, do not answer a phone call from a number you do not recognize, and if you get one of these calls do NOT answer the question, immediately hang up the phone.