Compare the smartphones with respect to their specifications- stuffcompare.com
General
Model Name : Asus Zenfone Zoom ZX551ML    
Announced : 2015, September    
SIM Type : Single SIM    
SIM Size : Micro SIM    
Color in Available : Pure Black, Ceramic White    
Hybrid Sim Slot : No    
Display
Type : IPS LCD Capacitive Touchscreen    
Size : 5.5 inches (--66.6% screen-to-body ratio)    
Resolution : 1080 x 1920 pixels (--401 ppi pixel density)    
Display colors : 16M colors    
Multitouch : Yes    
Protection : Corning Gorilla Glass 4    
Other feature : ASUS ZenUI    
Network & Connectivity
Network Technology : GSM / HSPA / LTE    
2G : GSM 850 / 900 / 1800 / 1900    
3G : HSDPA 850 / 900 / 1900 / 2100    
4G : LTE band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 9(1800), 18(800), 19(800), 28(700)    
SIM 1 : -    
SIM 2 : -    
Speed : HSPA 42.2/5.76 Mbps, LTE Cat4+ 250/50 Mbps    
GPRS : Yes    
EDGE : Yes    
WLAN : Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Hotspot    
Bluetooth : v4.1, A2DP, EDR    
GPS : Yes, A-GPS, GLONASS, BDS    
NFC : No    
Infrared : No    
Radio : No    
USB : microUSB v2.0    
Camera Description
Primary : 13 MP, f/2.7-4.8, 28-84mm (3x optical zoom), Laser autofocus, OIS, Dual-LED flash    
Features : Geo-tagging, Touch focus, Face detection, Panorama, HDR    
Video Recording : Yes    
Secondary : 5 MP, f/2.0    
Frame Rate : [email protected]    
Storage
RAM Size : 4 GB    
Internal : 32/64/128 GB, 5GB free lifetime ASUS WebStorage    
Expandable Storage : MicroSD card (up to 256 GB)    
Card slot : microSD    
Operating System
Operating System : Android OS, v5.0 (Lollipop), upgradable to v6.0 (Marshmallow)    
Processor
Processor Brand : Intel Atom Z3590    
Processor Speed : 2.5 GHz    
Core : Quad-core    
GPU : PowerVR G6430    
Operating Frequency : --    
Sensors
Sensors : Accelerometer, Gyro, Proximity, Compass    
Multimedia & Sound
Audio Formats : MP3/WAV/eAAC+ player    
Video Formats : MP4/H.264 player    
Alert Types : Vibration; MP3, WAV ringtones    
Loudspeaker : Yes    
3.5mm jack : Yes    
Battery
Battery Capacity : 3000 mAh    
Battery Type : Li-Po    
Removable Battery : No    
Fast battery charging : 60% in 40 min    
Battery Backup : -    
Other Features
Fingerprint Sensor : No    
Java : No    
Messaging : SMS(threaded view), MMS, Email, Push Email, IM    
Browse Type : HTML5    
Others : -    
Dimension & Weight
Width : 78.8 mm    
Height : 158.9 mm    
Depth : 12 mm    
Weight : 185 G