I was in a bind, expecting a critical phone call, and did not have my glasses available when I messed up and answered a call from 646-001-7890. Agree with difficult to understand Indian accent assessment. Claimed to be calling from IOLO and monitoring a problem with my computer and tied it into Microsoft. Told her not to call again and hung up. I have received 17 of these calls recently on my cell phone, over 10 since I advised do not call. I do not understand how, but the numbers are blocked and they still come through. Suspect some type of spoofing. There is nothing legitimate about these calls.
Truecaller is a good app for blocking specific or unknown #s check it out. I dont work for them. I use it and at the end of the week laugh at the 100s of spamfux who got blocked without a single ring.