Free access at AT&T hotspots for iPhone users was first announced at the beginning of May. Then it was disabled. It was reannounced today, but once again, it was a mistake. Why they keep doing this, who knows?The notice, which was still live at 8:30 a.m. PDT but then was removed by 9:30 a.m., said: “AT&T knows Wi-Fi is hot, and free Wi-Fi even hotter, which is why we are proud to offer iPhone customers free access to the nation’s largest Wi-Fi hot-spot network with more than 17,000