Apple is looking into reports that iOS 4 is causing a number of issues when installed on iPhone 3G units. The Wall Street Journal reports that a number of user reports have cropped up on Apple’s support forums, with the most common complaints being that the phone is slow after the upgrade, that it drains the battery quickly, or that it gets unreasonably hot. “This phone has gone from being a dream to constantly annoying me. Not a way to make…
