You get a call from Comcast and the person on the other end says you can lock in a decent rate for the next year if you pay for the first six months’ worth of service up front. It sounds a bit odd, but you’re always looking to save a few bucks, so you keep listening. The caller then tells you that the only way to pay that money is to put it on a prepaid cash card. This is when you hang up because the caller is probably trying to run a scam on you. [More]