As revealed late last week, AT&T today began offering the MOTO Z9. The handset is Motorola's slider equivalent to the RAZR2 V9 and shares most of the features of the flip phone, including its access to the carrier's HSPA-based 3G data network. AT&T notes that the Z9 is the first of its phones to support AT&T Navigator, a rebranded version of Tele