Original UMI ROME 5.5&rdquo; Screen Invtepy&reg; MTK6753 Octa Core 4G FDD LTE Mobile Phone Android 5.1 13.0MP+2.0MP Camera 3GB RAM 16GB ROM Smartphone (Black) 5.5 inch HD 1280*720 Pixels MTK6753 64bit Octa Core GPU: Mali-T720 Android 5.1 System 3GB RAM + 16GB ROM 13.0MP Back Camera + 2.0MP Front Camera 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.