Calls all the time with no msg.  Trying calling it back today and there wasn't even a ring.

They call my work every 20-30 minutes, but there's never any sound on the line- no one talking, no background noise, nothing. I've tried waiting a full minute (my phone times calls automatically) and nothing.

They have called several times never leave a message so know its a scam...

Call from India ven though caller ID shows 313 442-7362.  Represents DTE he says, and wants to reduce my GAS costs.  Oh really? Thought DTE was only an electric company.  I called him a scam, and he tried to shout back, but I didn't understand his language.

Said that he was from DTE and would reduce my costs 25%. Knew my name and address. Wanted my account number. I told him I didn't have it and he kept insisting that I take my time since he was paid by the hour. Said "no, thank you" and hung up on him. Sounded like he was from India.