I usually don't answer, but today, curiosity got the best of me.  CID said "cell phone PQ. Nobody there, just a machine sound. Will report.
My message is long, but please read. ..and my thanks to their 800notes community.
SCAMMING AND PHISHING CAN ONLY SUCCEED IF THERE IS A MARKET; AND THE MARKET NEEDS TO BE EDUCATED AND REMOVED!   The crooks and scamsters are bottom feeders that have no limits, conscience, or mothers.  Legislation (DNC FTC)  and you are the controls.
It has long been my standing that education provided (not) by the service providers and carriers is sorely lacking. They need to be made to take more responsibility  for allowing this fraud to continue.
If you dont recognize the name/number, DO NOT ANSWER. If you happen to answer, DO NOT RESPOND IN ANY WAY; NOT BY VOICE, SELECTED NUMBER OR CALL BACK!  If it is in the form of a pop-up, text or email, DO NOT SELECT ANY  LINK. Assume any response to be a hidden link... (to hell). After all, they are scammers and you dont really know what you answered or consented to do, give or buy, (for which your number may be billed).  If in the form of an email, open full address, take a screen shot then delete.
A legitimate company notification will identify you by name and never send you a link.  No matter how real, authentic, promising or threatening it appears, DO NOT RESPOND.  Call your private contact number to this company and check. Follow their instructions. They will probably request a copy of the suspect communication in some form...varies. They need to know when they are being spoofed.
Texting is a way to get around those of us who do not answer. Do not respond. Take a screen shot of the entire text, including the phone number or short code. Save it, then delete the text. REPORT.
HAVE, KEEP UP TO DATE, AND USE, AN ANTI-VIRUS APP ON BOTH COMPUTERS AND CELL PHONES.
And don't waste your time with cute answers...there's no use or  satisfaction and they don't care. They just move on to irritate or hook the next sucker. The longer you keep them on the line, the longer your access is open. Don't forget...they have your number and can get your address.
Regarding the DNC, you do not have to answer. Just dialing your number is an offense. File a complaint with the Federal Trade Commission for any and all unwanted and/or unsolicited calls (cell or land-line), texts, scams, phishing, ID theft, and others at www.ftccomplaintassistant.gov/Information#crnt
A legitimate caller will be identified, will leave a name, message, and call back number, giving you the option to respond. It will respect the DNC. You can file a complaint about offenders on the DO NOT CALL REGISTRY. Your registered number never expires. Be sure to register your cell phone too.