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Here in Canada we get many sales phone calls from Pakistan. The people can barely speaky zee Engrish or don't know how to use their phone and it sounds like they are selling Duck Cleaning but actually it is Duct Cleaning for furnace air ducts.
My furnace has an air filter that is cheap and I replace it every 3 months so I have never needed my ducks to be cleaned by those morons.
Their phone calls are halfway around the world and maybe they get a sale for 1 in 50 calls so they don't make much money. There was a documentary about it on TV. Their call center had hundreds of sales people on the phones.
They sell each sale to a cleaning company here who pays them.
Hey, I am retired with lots of spare time. I speak perfect English. My local phone calls are free and I know how to use my phone. I could sell Duck Cleaning better than them. I can also sell windows and doors.
I wonder how many of these phone calls will activate a remote car starter?
I am sure this all varies from phone to phone but overall considering everything else in today's cars and trucks that is always on I doubt the phone will matter much in the big picture. Anyway, the above link is a fair read on the subject.