Apple’s 20th anniversary iPhone could go full glass, lose the buttons, and make today’s iPhones look instantly old Ice Universe / X The iPhone’s journey began in 2007 by changing the smartphone market forever, replacing physical keyboards with a 3.5-inch multi-touch display. Now, as the device moves toward its 20th anniversary, Apple may be preparing for another major design shift, a seamless, completely buttonless iPhone. Is Apple planning its biggest iPhone redesign in years? Bloomberg’s Mark Gurman has added fresh weight to the iPhone 20 redesign rumors. In the Q&A section of his Power On newsletter, Gurman said Apple’s 20th-anniversary iPhone overhaul is internally referred to by some as “Glasswing,” a name inspired by the glasswing butterfly and its transparent wings. iPhone Unsplash According to Gurman, the design includes glass edges that curve smoothly into the display on all four sides.…