iOS9.2.1正式版固件更新内容是什么?答:iPhone 6: Model A1549, A1586 iPhone 6S: Model A1633, A1688, A1691, A1700 iPhone 6S Plus: Model A1634, A1687, A1690, A1699 iPad 2: Model A1395, A1396, A1397, A1395 iPad Mini: Model A1432, A1454, A1455 iPad 3: Model A1416, A1403, A1430 iPad 4: Model A1458...