Sony Xperia Z1 C6903 16GB Unlocked GSM 4G LTE WaterProof Smartphone w/ 20MP Camera and Shatter-Proof Glass - White 5.0 inches (~441 ppi pixel density) Multitouch 16 GB, 2 GB RAM Android OS, v4.2 (Jelly Bean) 20.7 MP, autofocus, LED flash Stereo FM radio with RDS 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.