I am ACIT and ACMT certified working for an AASP and you're absolutely right. The Audio IC issue with iPhone 7 and 7+ is awful but Apple refuses to acknowledge it's their problem. They had a rep program for a few months when it first started surfacing but then cancelled it when their own internal investigation said it wasn't their fault. While we tend not to recommend the 6s, we also don't sell and iPhones whether new or refurb.