The problem of having somebody actually answer the phone continues to be difficult. I have taken some calls and, like others have mentioned, some of those calls involve a guest asking us to spend a lot of time seeing if something is in stock even if our zebras say there are zero on the floor and zero in the back. For anyone working on the front end, actually answering a call and attempting to route or process the request runs the risk of incurring the wrath of an understandably-PO'd TL or LOD who sees growing lineups at the service desk, self checkout or the register lanes.
Do other typical stores and businesses in your local area -- think of Home Depot, Safeway, Rite Aid, Walgreens, Fred Meyer, Costco -- have as much trouble actually answering customer phone calls? Answering phone calls is a big priority for most of our competitors. The speed of answering a phone call, as well as the time involved in getting an answer from the right person, is a key part of what many adults think of when it comes to the phrase "customer service".
Target's dialogue about "empowerment" and "guests first!" really should include assigning a store TM, on a given shift during the day, to answering the phones in the office or in a backroom area while also handling non-urgent but necessary tasks like sorting reshop, helping the ETLs with clerical tasks or so forth. Answering calls requires undivided attention particularly since some people's voices are hard to understand on the phone, some people have trouble expressing themselves, you may need to research the question on your zebra, or you may need to route the call to the correct person or department.