Its a SCAM !! If u call them back it says the Survey u called about is over and if u wish to be removed from their calling list press one.Well we know that does no good.I call back these numbers on a old cell i got the ringer turned off and i have no voice mail,it came with my plan and i only need one cell but got the 2nd one free.I just wish our Government would protect us from places like this but we know they wont do that.