Model Number : ZX551ML 
Display : 5.5 inch Full HD 
Memory : 4 GB RAM | 64 GB ROM | Expandable Upto 1 TB
Camera : 13MP Rear Camera | 5MP Front Camera
Sim Type : Dual Sim, VoLTE, 4G, 3G, Wi-Fi

Model Number : ZE553KL 
Memory : 4GB RAM
Display :  5.5 inch 1080x1920 pixels
Camera : 12MP + 12MP Dual Rear Camera | 13MP Front Camera
Sim Type : Dual Sim, VoLTE, 4G, 3G, Wi-Fi