Samsung Galaxy Mega GT-i9200 - 8GB - White (Factory Unlocked) International Version 2G Network GSM 850 / 900 / 1800 / 1900 3G Network HSDPA 900 / 2100 - ST26i OS Android OS, v4.2.2 (Jelly Bean) CPU Dual-core 1.7 GHz Krait Internal 8/ GB, 1.5 GB RAM 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.