I just got a call too on my cell, I called it back from a landline and it says "Hello, please press 1 if you would like to be placed on a do not called list" I stayed on the line and it just keeps repeating same message! what a way to waste peoples time!
I normally do not answer unknown numbers but did this time to avoid waking up my spouse. An automated female voice said that due to the upcoming ComEd rate hikes I qualify for a discount plan and asked for me to press the * key to be connected to a company agent to determine which plan I might be eligible for. The caller ID displayed "Customer Care". I hung up realizing there is no way ComEd would contact each of its customers by phone to offer discounts. The old "to good to be true" game. Adding this number to DO NOT CALL list is likely a waste of time. I'm going to look into call blocking technology 'cause I'm getting a lot of BS calls (not answering them) in the last 2 months.