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Asus Zenfone V V520KL

Asus Zenfone 4 Pro ZS551KL

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 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100
4G Network	2, 4, 5, 13	1, 2, 3, 4, 5, 7, 8, 17, 19, 20, 28, 38, 39, 40, 41 - Global, Taiwan
		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 (2CA) Cat6 400/50 Mbps	HSPA 42.2/5.76 Mbps, LTE (3CA) Cat12 600/150 or 100 Mbps

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

Body
Dimensions	146.6 x 72.6 x 7.6 mm (5.77 x 2.86 x 0.30 in)	156.9 x 75.6 x 7.6 mm (6.18 x 2.98 x 0.30 in)
Weight	147.1 g (5.19 oz)	175 g (6.17 oz)
Build		Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame
SIM	Hybrid Dual SIM (Nano-SIM, dual stand-by)	Hybrid Dual SIM (Nano-SIM, dual stand-by)

Display
Type	AMOLED	AMOLED
Size	5.2 inches, 74.5 cm2 (~70.0% screen-to-body ratio)	5.5 inches, 83.4 cm2 (~70.3% screen-to-body ratio)
Resolution	1080 x 1920 pixels, 16:9 ratio (~424 ppi density)	1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
Protection	Corning Gorilla Glass 3	Corning Gorilla Glass 5

Platform
OS	Android 7 (Nougat), ZenUI 3	Android 7.1.1 (Nougat), upgradable to Android 8 (Oreo), ZenUI 4
Chipset	Qualcomm MSM8996 Snapdragon 820 (14 nm)	Qualcomm MSM8998 Snapdragon 835 (10 nm)
CPU	Quad-core (2x2.15 GHz Kryo & 2x1.6 GHz Kryo)	Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)
GPU	Adreno 530	Adreno 540

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

Main Camera
Modules	23 MP, f/2.0, 1/2.6", 1.0µm, PDAF, Laser AF, 4-axis OIS	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
Features	Dual-LED dual-tone flash, HDR, panorama	LED flash, HDR, panorama
Video	4K@30fps, 1080p@30fps	4K@30fps, 1080p@30/60fps, 1080p@120fps, 720p@240fps

Selfie Camera
Modules	8 MP, f/2.0	8 MP, f/1.9, 22mm (wide), 1/3.2", 1.4µm, PDAF
Features	HDR, panorama	HDR
Video	1080p@30fps	1080p@30fps

Sound
Loudspeaker	Yes	Yes, dual speakers
3.5mm jack	Yes	Yes
	24-bit/192kHz audio	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	4.2, A2DP, EDR, LE	5.0, A2DP, EDR, LE, aptX
Positioning	GPS, GLONASS, BDS	GPS, GLONASS, BDS, GALILEO
NFC	No	Yes
Infrared port	No	Yes
Radio	No	FM radio
USB	USB Type-C 3.0	USB Type-C 2.0, OTG

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

Battery
Type	Li-Ion 3000 mAh, non-removable	Li-Ion 3600 mAh, non-removable
Charging	18W wired, PD 2.0, QC2, 60% in 37 min (advertised)	18W wired, 50% in 32 min (advertised)
Stand-by	Up to 210 h (3G)
Talk time	Up to 18 h (3G)	Up to 27 h 30 min (3G)

Misc
Colors	Sapphire Black	Moonlight white, Pure Black
Models	A006, A009	Z01GD, Z01GS
Price	About 100 EUR	About 350 EUR