He said, "Hi Grandma."  I answered, "Hi."
He said "What's you doing?", I said "Not much."  

I am clearly NOT a grandma.  Grandpa, maybe, but not a grandma.
So, I hung up.

Got a call from from Quebec - said he was my oldest grandson - but my oldest grandson is a girl - said he'd been sick and he needed some money - I told him I didn't have any.  Said he'd call me back.  It's a scam clearly.

Got the same message.

this person has been phone stalking me. he has called over 30 times this week, and the couple of times i have picked up he has said really creepy things. Im going to block the number tomorrow.

tried to say they were a nephew of my mom

Just got a call from this number and the guy says...Hello, grandma....I say yes, he keeps talking and I ask who this is...he says, "don't you recognize my voice" so I say NO...and he keeps going saying "it's me grandma".....so I tell him I do NOT have a grandson and he goes "oh, must be wrong number".You think so you MORON!!!  Must be a scam call for sure!!