caller ID said "Service Call", they know the make of the car you own or used to own and ask if you would like to renew, buy, a new warranty.

Called too add additional warranty on my brand new jeep..they knew most of my information about the purchase, except that I had purchased the extended warrant already. Believe it's a scam!

I get calls from this number with some regularity, and they always go the same way.  I pick up the phone, say "hello", and wait a moment.  After that there is a brief sound (seems to be an electronic sound more than a voice, maybe it's a bad recording) and then nothing.  After that I usually hang up.  I tried sticking around once but never got anything else.  Probably a scam of some kind.

want's to sell car warranty and has description on one of my cars

I get repeated calls to my cell phone