I do know that US Cellular as of 2012 no longer operates in its headquarters city of Chicago <https://www.prnewswire.com/news-releases/us-cellular-to-sell-selec

I do know that US Cellular as of 2012 no longer operates in its headquarters city of Chicago <https://www.prnewswire.com/news-releases/us-cellular-to-sell-select-midwest-markets-to-sprint-177625271.html https://www.prnewswire.com/news-releases/us-cellular-to-sell...>.