New ASUS Padfone S 4G LTE(Unlocked) 16GB 5" Phone Only Micro SIM PF500KL Black - International Stock No Warranty 4G LTE ; AT&T, T-Mobile & other GSM carriers ; LTE compatibility: This is international stock, varies per carrier (ensure to check with your carrier before purchase); DOES NOT work with Sprint, Verizon, U.S. Cellular and all other CDMA carriers. Android 4.4 (KitKat ) with ZenUI . This cell phone may not include a US warranty as some manufacturers do not honor warranties for international version phones. Please contact the seller for specific warranty information .