Asus Zenfone 2 ZE551ML vs Asus Zenfone Pegasus 3 vs Asus Zenfone 4 Pro

General Info

Manufacturer
Asus	Asus	Asus
Announced
January 2015	June 2016	August 2017
Status
Available - March 2015	Coming Soon - June 2016	Coming Soon - September 2017
Price
Rs. 14,999 ($220.57) [Similarly Priced]	Rs. 12,999 ($191.16) [Similarly Priced]	-
Colors
Osmium Black, Sheer Gold, Glacier Gray, Glamor Red, Ceramic Whit	Gold, Silver, Gray, Rose Gold	Champagne Gold
Form Factor
Candybar	Candybar	Candybar
Dimension
152.5 x 77.2 x 10.9 mm (6 x 3.04 x 0.43 in)	149.5 x 73.7 x 8.6 mm (5.89 x 2.9 x 0.34 in)	156.9 x 75.6 x 7.6 mm (6.18 x 2.98 x 0.3 in)
Weight
170 g (6 oz)	158.4 g (5.57.0.14 oz)	175 g (6.17 oz)
SIM Type
-	-	Dual SIM (Nano-SIM, dual stand-by)
2G Network
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network
HSDPA 850 / 900 / 1900 / 2100	HSDPA 850 / 900 / 1900 / 2100	HSDPA 2100
4G Network
LTE 700 / 800 / 850 / 900 / 1700 / 1800 / 1900 / 2100 / 2600 (Bands 1, 2, 3, 4, 5, 7, 8, 9, 17, 18, 19, 20, 28, 29)	LTE	LTE
Messaging
SMS, MMS, Push Mail, EMail, IM	SMS, MMS, Push Mail, EMail, IM	SMS, MMS, Push Mail, EMail
Build Features
-	-	- Fingerprint Sensor
Notification LED
-	-	Yes

OS
Android OS, v5.0 (Lollipop)	Android OS, v6.0.1 (Marshmallow)	Android OS, v7.1.1 (Nougat)
Processor
Quad-core 2.3 GHz Quad-core 1.8 GHz, Intel Atom Z3580 Intel Atom Z3560	Quad-core 1.3 GHz, MediaTek	Octa-core (4x2.35 GHz Kryo & 4x1.9 GHz Kryo), Qualcomm MSM8998 Snapdragon 835
GPU
PowerVR G6430	-	Adreno 540
RAM
2/4 GB	2/3 GB	6 GB
Internal Memory
16/32/64 GB	16/32 GB	64/128GB
External Memory
microSD, up to 64 GB	microSD, up to 256 GB (uses SIM 2 slot)	microSD, up to 256 GB

Type
IPS Capacitive Touchscreen, Corning Gorilla Glass 3	IPS LCD capacitive touchscreen	AMOLED, 2.5D Glass, Gorilla Glass 5 Protection
Colors
16M colors	16M colors	16M colors
Size
5.5 inches	5.2 inches	5.5 inches
Resolution
1080 x 1920 pixels (401 ppi)	720 x 1280 pixels (282 ppi)	1080 x 1920 pixels (401 ppi)
Screen-to-Body Ratio
70.67%	67.86%	70.14%
Multi-Touch

Rear Camera
13 MP, 4128 x 3096 pixels	13 MP, f/2.2	Dual 12 MP + 16 MP
Flash
dual-LED (dual tone)	LED flash	Dual LED Flash
Features
Auto focus, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR	Auto focus, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR	Phase Detection Autofocus, f/1.7, OIS, secondary 50mm lens, laser autofocus, 2x Optical Zoom, 1.4µm pixel size, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR
Video
1080p@30fps	1080p@30fps	2160p@30fps, 1080p@30fps, 720p@120fps
Front Camera
5 MP	5 MP, f/2.0	8 MP, f/1.9

GPRS
Yes	Yes	Yes
Edge
Yes	Yes	Yes
3G
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps	HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps	HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps, VoLTE
Bluetooth
v4.0, A2DP, EDR	Yes	Yes, v4.2
Wi-Fi
Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, hotspot	Wi-Fi 802.11 b/g/n, hotspot	Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot
USB
microUSB v2.0, USB Host	microUSB v2.0	Type-C 1.0 reversible connector, Fast Charging
GPS
Yes, with A-GPS, GLONASS	Yes, with A-GPS, GLONASS	Yes, with A-GPS
Browser
HTML5	HTML5	HTML5