They called me last night, then hung up when I answered.

Called me just now. Nobody on the other line.

I got calls from this phone number a couple of times. But they did not tell me anything. I called back and it was music.

Just got a call from this number... no message left. It said it is from Evanstead, WI.

Here it is...Friday eve. I work from home and contract out my services for collecting bad debt during the evening hours for a legal firm in Mpls.  I immediately saw it was a Western part Wisconsin area code and hoping it was a potential client. I answered, but no response. With caller ID I returned the call and of course music.
I stayed on the line and a nice person answered representing his/her company of employment. It's apparently a call center in WI.  From what I gathered, the people that are being called had visited home improvement stores such as Menards, Lowes, Home Depot in St. Cloud, MN, and placed their name and telephone number on a stupid piece of paper "HOPING" they were going to win something? It usually doesn't work that way.  "BUT I DID WIN A ROBO CALL!!"
I was asked if I was that person on the piece of paper of "HOPE".  No! and it appears that person on the piece of paper couldn't remember his/her cell number.
So anyway, feed your dog "HOPE", see how long it will live, and remember your cell phone number so "IDIOTS" like whoever they may be, don't waste others peoples time.