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	Compare with Asus Zenfone 4 Pro ZS551KL	Compare with Xiaomi Mi A1 (Mi 5X)
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Asus Zenfone 4 Pro ZS551KL

Xiaomi Mi A1 (Mi 5X)

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 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100	HSDPA 850 / 900 / 1900 / 2100
4G Network	1, 2, 3, 4, 5, 7, 8, 17, 19, 20, 28, 38, 39, 40, 41 - Global, Taiwan	1, 3, 5, 7, 8, 20, 38, 40
	1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 29, 30, 38, 39, 41 - US, Canada, Brazil
	1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 29, 30, 38, 39, 40, 41 - India
Speed	HSPA 42.2/5.76 Mbps, LTE (3CA) Cat12 600/150 or 100 Mbps	HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps

Launch
Announced	2017, August	2017, September
Status	Available. Released 2017, October	Available. Released 2017, September

Body
Dimensions	156.9 x 75.6 x 7.6 mm (6.18 x 2.98 x 0.30 in)	155.4 x 75.8 x 7.3 mm (6.12 x 2.98 x 0.29 in)
Weight	175 g (6.17 oz)	165 g (5.82 oz)
Build	Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame	Glass front (Gorilla Glass 3), aluminum back, aluminum frame
SIM	Hybrid Dual SIM (Nano-SIM, dual stand-by)	Hybrid Dual SIM (Nano-SIM, dual stand-by)

Display
Type	AMOLED	IPS LCD
Size	5.5 inches, 83.4 cm2 (~70.3% screen-to-body ratio)	5.5 inches, 82.6 cm2 (~70.1% screen-to-body ratio)
Resolution	1080 x 1920 pixels, 16:9 ratio (~401 ppi density)	1080 x 1920 pixels, 16:9 ratio (~403 ppi density)
Protection	Corning Gorilla Glass 5	Corning Gorilla Glass 3

Platform
OS	Android 7.1.1 (Nougat), upgradable to Android 8 (Oreo), ZenUI 4	Android 7.1.2 (Nougat), upgradable to Android 9.0 (Pie), Android One
Chipset	Qualcomm MSM8998 Snapdragon 835 (10 nm)	Qualcomm MSM8953 Snapdragon 625 (14 nm)
CPU	Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)	Octa-core 2.0 GHz Cortex-A53
GPU	Adreno 540	Adreno 506

Memory
Card slot	microSDXC (uses shared SIM slot)	microSDXC (uses shared SIM slot)
Internal	64GB 6GB RAM, 128GB 6GB RAM	32GB 4GB RAM, 64GB 4GB RAM
		eMMC 5.1

Main Camera
Modules	12 MP, f/1.7, 25mm (wide), 1/2.55", 1.4µm, dual pixel PDAF, Laser AF, 4-axis OIS 16 MP, 50mm (telephoto), 1/3.1", 1.0µm, AF, 2x optical zoom	12 MP, f/2.2, 26mm (wide), 1/2.9", 1.25µm, PDAF 12 MP, f/2.6, 50mm (telephoto), 1.0µm, AF, 2x optical zoom
Features	LED flash, HDR, panorama	Dual-LED dual-tone flash, HDR, panorama
Video	4K@30fps, 1080p@30/60fps, 1080p@120fps, 720p@240fps	4K@30fps, 1080p@30fps, 720p@120fps

Selfie Camera
Modules	8 MP, f/1.9, 22mm (wide), 1/3.2", 1.4µm, PDAF	5 MP
Features	HDR
Video	1080p@30fps	1080p@30fps

Sound
Loudspeaker	Yes, dual speakers	Yes
3.5mm jack	Yes	Yes
	24-bit/192kHz audio

Comms
WLAN	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth	5.0, A2DP, EDR, LE, aptX	4.2, A2DP, LE
Positioning	GPS, GLONASS, BDS, GALILEO	GPS, GLONASS, BDS
NFC	Yes	No
Infrared port	Yes	Yes
Radio	FM radio	FM radio
USB	USB Type-C 2.0, OTG	USB Type-C 2.0

Features
Sensors	Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, color spectrum	Fingerprint (rear-mounted), accelerometer, gyro, proximity

Battery
Type	Li-Ion 3600 mAh, non-removable	Li-Po 3080 mAh, non-removable
Charging	18W wired, 50% in 32 min (advertised)	10W wired
Talk time	Up to 27 h 30 min (3G)

Misc
Colors	Moonlight white, Pure Black	Black, Gold, Rose Gold, Red
SAR		1.75 W/kg (head)     0.76 W/kg (body)
Models	Z01GD, Z01GS	MDG2, MDI2
Price	About 350 EUR	About 170 EUR

Tests
Performance		GeekBench: 4292 (v4.4) GFXBench: 3.5fps (ES 3.1 onscreen)
Display		Contrast ratio: 1570:1 (nominal), 2.689 (sunlight)
Loudspeaker		Voice 74dB / Noise 73dB / Ring 90dB
Audio quality		Noise -91.0dB / Crosstalk -82.5dB
Battery (old)		Endurance rating 87h