Nokia X RM980 Black Dual SIM - Factory Unlocked - International Version No Warranty Display: 480 x 800 pixels, 4.0 inches (~233 ppi pixel density) Internal Memory: 4 GB, 512 MB RAM OS: Android OS, v4.1.2 (Jelly Bean) Unlocked cell phones are compatible with GSM carriers such as AT&T and T-Mobile, but are not compatible with CDMA carriers such as Verizon and Sprint. 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.