My 94 year old Dad just got a call from someone, I picked up the phone at the same time

The person said
Hi grandpa
Dad laughed and said hi who is this
The guy said your grandson
Dad said which one
The guy said Michael

I said " there is no grandson named Michael, who is this?

Click ... The guy was gone

You could tell he was black with a bit of a foreign accent

By *69 the phone number was

8722584710
I called and of course it goes to nothing

Completely bizarre