Same thing just happened on my work phone. Pretty sure it was a robo call. It was a recording that was saying wrong #. Called them back and got a VM that said it was Jim. Probably just collecting valid phone #'s to sell.
Just got a call from this number at work. Same thing: the voice said "hello, hello?" just as I picked up the phone, and then I identified myself, then the voice said he's sorry, he dialed the wrong number, and when I proceeded to ask what number he dialed, the connection broke.
Called Saturday afternoon.CID said Nebrasca Call. I picked up without saying anything and got the same BS other people reported. Voice said hello and then said he had the wrong number. It must be data mining.