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	Compare with Xiaomi Redmi 4 (4X)	Compare with Asus Zenfone Selfie ZD551KL
Full Differences Change compare mode	Review Specs ALL VERSIONSREDMI 4 - IndiaREDMI 4X - China, Malaysia, PakistanREDMI 4X (ID) - Indonesia	Review Specs

Xiaomi Redmi 4 (4X)

Asus Zenfone Selfie ZD551KL

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
4G Network	1, 3, 5, 7, 8, 38, 39, 40, 41	1, 2, 3, 5, 7, 8, 20 - Global
		1, 2, 3, 5, 6, 8, 9, 18, 19, 28 - Taiwan
		1, 2, 3, 4, 5, 7, 8, 17, 20 - USA
		1, 3 - India
Speed	HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/100 Mbps	HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps

Launch
Announced	2017, May	2015, June. Released 2015, August
Status	Available. Released 2017, May	Discontinued

Body
Dimensions	139.2 x 70 x 8.7 mm (5.48 x 2.76 x 0.34 in)	156.5 x 77.2 x 10.8 mm (6.16 x 3.04 x 0.43 in)
Weight	150 g (5.29 oz)	170 g (6.00 oz)
Build	Glass front (Gorilla Glass), aluminum back, aluminum frame, plastic ends	Glass front (Gorilla Glass 4), plastic back, plastic frame
SIM	Hybrid Dual SIM (Nano-SIM/ Micro-SIM, dual stand-by)	Dual SIM (Micro-SIM, dual stand-by)

Display
Type	IPS LCD	IPS LCD
Size	5.0 inches, 68.9 cm2 (~70.7% screen-to-body ratio)	5.5 inches, 82.6 cm2 (~68.3% screen-to-body ratio)
Resolution	720 x 1280 pixels, 16:9 ratio (~294 ppi density)	1080 x 1920 pixels, 16:9 ratio (~403 ppi density)
Protection	Corning Gorilla Glass (unspecified version)	Corning Gorilla Glass 4, oleophobic coating

Platform
OS	Android 6.0.1 (Marshmallow), upgradable to 7.1.2 (Nougat), MIUI 11	Android 5.0 (Lollipop), upgradable to 6.0 (Marshmallow), ZenUI
Chipset	Qualcomm MSM8940 Snapdragon 435 (28 nm)	Qualcomm MSM8939 Snapdragon 615 (28 nm)
CPU	Octa-core 1.4 GHz Cortex-A53	Octa-core (4x1.7 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53)
GPU	Adreno 505	Adreno 405

Memory
Card slot	microSDXC (uses shared SIM slot)	microSDXC (dedicated slot)
Internal	16GB 2GB RAM, 16GB 3GB RAM, 32GB 3GB RAM, 64GB 3GB RAM, 64GB 4GB RAM	16GB 2GB RAM, 32GB 3GB RAM
	eMMC 5.1	eMMC 4.5

Main Camera
Modules	13 MP, f/2.0, PDAF	13 MP, f/2.0, 28mm (wide), 1/3.0", Laser AF
Features	LED flash, HDR, panorama	Dual-LED dual-tone flash, panorama, HDR
Video	1080p@30fps	1080p@30fps

Selfie Camera
Modules	5 MP, f/2.2	13 MP, f/2.2, 1/3.1", 1.12µm, AF
Features		Dual-LED dual-tone flash
Video	1080p@30fps	1080p@30fps

Sound
Loudspeaker	Yes	Yes
3.5mm jack	Yes	Yes

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

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

Battery
Type	Li-Po 4100 mAh, non-removable	Li-Po 3000 mAh, removable
Stand-by	Up to 432 h (3G)
Talk time	Up to 36 h (3G)
Music play	Up to 87 h

Misc
Colors	Black, Gold	Pure White, Chic Pink, Aqua Blue
SAR	0.77 W/kg (head)     0.83 W/kg (body)
Models	2016060, 2016090, MAG138, MAE136, Redmi 4, Redmi 4X	Z00UD, Z00UDH, Z00UDC, Z00UDB
Price	About 110 EUR	About 280 EUR

Tests
Performance	GeekBench: 1819 (v4.4) GFXBench: 5.1fps (ES 3.1 onscreen)	Basemark OS II 2.0: 883 Basemark X: 4915
Display	Contrast ratio: 915 (nominal), 2.920 (sunlight)	Contrast ratio: 928:1 (nominal), 1.680 (sunlight)
Camera	Compare PHOTO / Compare VIDEO
Loudspeaker	Voice 64dB / Noise 70dB / Ring 72dB	Voice 65dB / Noise 66dB / Ring 75dB
Audio quality	Noise -94.3dB / Crosstalk -94dB	Noise -92.1dB / Crosstalk -92.5dB
Battery (old)	Endurance rating 80h	Endurance rating 63h