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	Compare with Asus Zenfone 2 ZE551ML	Compare with Xiaomi Redmi 4 (4X)
Full Differences Change compare mode	Review Specs	Review Specs ALL VERSIONSREDMI 4 - IndiaREDMI 4X - China, Malaysia, PakistanREDMI 4X (ID) - Indonesia

Asus Zenfone 2 ZE551ML

Xiaomi Redmi 4 (4X)

Network
Technology	GSM / HSPA / LTE	GSM / HSPA / LTE
2G bands	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
	TD-SCDMA - China & India
4G Network	1, 2, 3, 4, 5, 8, 9, 18, 19, 28 - Taiwan	1, 3, 5, 7, 8, 38, 39, 40, 41
	1, 2, 3, 4, 5, 7, 8, 20 - Global
	1, 2, 3, 4, 5, 7, 8, 17, 20 - US
	1, 3, 38, 39, 40, 41 - China & India
Speed	HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps	HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/100 Mbps

Launch
Announced	2015, January. Released 2015, March	2017, May
Status	Discontinued	Available. Released 2017, May

Body
Dimensions	152.5 x 77.2 x 10.9 mm (6.00 x 3.04 x 0.43 in)	139.2 x 70 x 8.7 mm (5.48 x 2.76 x 0.34 in)
Weight	170 g (6.00 oz)	150 g (5.29 oz)
Build	Glass front (Gorilla Glass 3), plastic back, plastic frame	Glass front (Gorilla Glass), aluminum back, aluminum frame, plastic ends
SIM	Dual SIM (Micro-SIM, dual stand-by)	Hybrid Dual SIM (Nano-SIM/ Micro-SIM, dual stand-by)

Display
Type	IPS LCD	IPS LCD
Size	5.5 inches, 83.4 cm2 (~70.8% screen-to-body ratio)	5.0 inches, 68.9 cm2 (~70.7% screen-to-body ratio)
Resolution	1080 x 1920 pixels, 16:9 ratio (~401 ppi density)	720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Protection	Corning Gorilla Glass 3	Corning Gorilla Glass (unspecified version)

Platform
OS	Android 5.0 (Lollipop), upgradable to 6.0 (Marshmallow)	Android 6.0.1 (Marshmallow), upgradable to 7.1.2 (Nougat), MIUI 11
Chipset	Intel Atom Z3580 (4 GB RAM model) Intel Atom Z3560 (2 GB RAM model)	Qualcomm MSM8940 Snapdragon 435 (28 nm)
CPU	Quad-core 2.3 GHz (4 GB RAM model) Quad-core 1.8 GHz (2 GB RAM model)	Octa-core 1.4 GHz Cortex-A53
GPU	PowerVR G6430	Adreno 505

Memory
Card slot	microSDXC (dedicated slot)	microSDXC (uses shared SIM slot)
Internal	16GB 2GB RAM, 32GB 2GB RAM, 32GB 4GB RAM, 64GB 4GB RAM, 128GB 4GB RAM	16GB 2GB RAM, 16GB 3GB RAM, 32GB 3GB RAM, 64GB 3GB RAM, 64GB 4GB RAM
		eMMC 5.1

Main Camera
Modules	13 MP, f/2.0, AF	13 MP, f/2.0, PDAF
Features	Dual-LED dual-tone flash, panorama, HDR	LED flash, HDR, panorama
Video	1080p@30fps	1080p@30fps

Selfie Camera
Modules	5 MP, f/2.0	5 MP, f/2.2
Video		1080p@30fps

Sound
Loudspeaker	Yes	Yes
3.5mm jack	Yes	Yes

Comms
WLAN	Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, hotspot	Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Bluetooth	4.0, A2DP, EDR	4.2, A2DP, LE
Positioning	GPS, GLONASS	GPS, GLONASS, BDS
NFC	Yes	No
Infrared port	No	Yes
Radio	FM radio, RDS	FM radio
USB	microUSB 2.0, OTG	microUSB 2.0

Features
Sensors	Accelerometer, gyro, proximity, compass	Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass

Battery
Type	Li-Po 3000 mAh, non-removable	Li-Po 4100 mAh, non-removable
Charging	18W wired, 60% in 40 min (advertised)
Stand-by		Up to 432 h (3G)
Talk time		Up to 36 h (3G)
Music play		Up to 87 h

Misc
Colors	Osmium Black, Sheer Gold, Glacier Gray, Glamor Red, Ceramic White	Black, Gold
SAR		0.77 W/kg (head)     0.83 W/kg (body)
SAR EU	0.35 W/kg (head)
Models	Z00AD, Z00A	2016060, 2016090, MAG138, MAE136, Redmi 4, Redmi 4X
Price	About 300 EUR	About 110 EUR

Tests
Performance	Basemark OS II 2.0: 1090 Basemark X: 12565	GeekBench: 1819 (v4.4) GFXBench: 5.1fps (ES 3.1 onscreen)
Display		Contrast ratio: 915 (nominal), 2.920 (sunlight)
Camera	Compare PHOTO / Compare VIDEO
Loudspeaker	Voice 62dB / Noise 61dB / Ring 67dB	Voice 64dB / Noise 70dB / Ring 72dB
Audio quality		Noise -94.3dB / Crosstalk -94dB
Battery (old)	Endurance rating 59h	Endurance rating 80h