ZTE ZMAX 2 16 GB Z958 AT&T GSM Unlocked 4G LTE 5.5'' IPS LCD 8MP Android Smartphone - Black ZTE ZMax 2 Z958 AT&T Black/Grey, Prepaid, Clean ESN Qualcomm MSM8916 Snapdragon 410 Android OS, v5.1 (Lollipop), upgradable to v6.0.1 (Marshmallow)