It’s official: Apple is holding an event on September 7 at the Bill Graham Civic Center in San Francisco. As you might imagine, we’re expecting new iPhones — two, to be precise. An iPhone 7 and 7 Plus, which should have a few tricks up it sleeve. September 7, iPhone 7 — get it? Many think the newest iPhones will ditch the audio jack in favor of a Lightning connection for wired sound, and add a second speaker grill. Elsewhere, the larger iPhone 7 Plus is widely believed to have two cameras, while the iPhone 7 could see optical image…

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