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Asus Zenfone 2 ZE551ML

Samsung Galaxy A8

Network
Technology	GSM / HSPA / LTE	GSM / HSPA / LTE
2G bands	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2	GSM 850 / 900 / 1800 / 1900
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, 20
	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 Cat6 300/50 Mbps

Launch
Announced	2015, January. Released 2015, March	2015, July. Released 2015, August
Status	Discontinued	Discontinued

Body
Dimensions	152.5 x 77.2 x 10.9 mm (6.00 x 3.04 x 0.43 in)	158 x 76.8 x 5.9 mm (6.22 x 3.02 x 0.23 in)
Weight	170 g (6.00 oz)	151 g (5.33 oz)
Build	Glass front (Gorilla Glass 3), plastic back, plastic frame	Glass front (Gorilla Glass 4), plastic back, aluminum frame
SIM	Dual SIM (Micro-SIM, dual stand-by)	Nano-SIM

Display
Type	IPS LCD	Super AMOLED
Size	5.5 inches, 83.4 cm2 (~70.8% screen-to-body ratio)	5.7 inches, 89.6 cm2 (~73.8% screen-to-body ratio)
Resolution	1080 x 1920 pixels, 16:9 ratio (~401 ppi density)	1080 x 1920 pixels, 16:9 ratio (~386 ppi density)
Protection	Corning Gorilla Glass 3	Corning Gorilla Glass 4

Platform
OS	Android 5.0 (Lollipop), upgradable to 6.0 (Marshmallow)	Android 5.1.1 (Lollipop), upgradable to 6.0 (Marshmallow)
Chipset	Intel Atom Z3580 (4 GB RAM model) Intel Atom Z3560 (2 GB RAM model)	Qualcomm MSM8939 Snapdragon 615 (28 nm)
CPU	Quad-core 2.3 GHz (4 GB RAM model) Quad-core 1.8 GHz (2 GB RAM model)	Octa-core (4x1.8 GHz Cortex-A53 & 4x1.3 GHz Cortex-A53)
GPU	PowerVR G6430	Adreno 405

Memory
Card slot	microSDXC (dedicated slot)	microSDXC (dedicated slot)
Internal	16GB 2GB RAM, 32GB 2GB RAM, 32GB 4GB RAM, 64GB 4GB RAM, 128GB 4GB RAM	32GB 2GB RAM
		eMMC 4.5

Main Camera
Modules	13 MP, f/2.0, AF	16 MP, f/1.9, 31mm (standard), AF
Features	Dual-LED dual-tone flash, panorama, HDR	LED flash, panorama, HDR
Video	1080p@30fps	1080p@30fps

Selfie Camera
Modules	5 MP, f/2.0	5 MP, f/1.9, 23mm (wide)
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 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
Bluetooth	4.0, A2DP, EDR	4.1, A2DP, EDR, LE
Positioning	GPS, GLONASS	GPS, GLONASS/ BDS (market dependant)
NFC	Yes	Yes
Infrared port	No	No
Radio	FM radio, RDS	FM radio, RDS, recording
USB	microUSB 2.0, OTG	microUSB 2.0

Features
Sensors	Accelerometer, gyro, proximity, compass	Fingerprint (front-mounted), accelerometer, proximity, compass
		ANT+

Battery
Type	Li-Po 3000 mAh, non-removable	Li-Ion 3050 mAh, non-removable
Charging	18W wired, 60% in 40 min (advertised)
Talk time		Up to 17 h (3G)
Music play		Up to 51 h

Misc
Colors	Osmium Black, Sheer Gold, Glacier Gray, Glamor Red, Ceramic White	Pearl White, Midnight Black, Champagne Gold
SAR EU	0.35 W/kg (head)	0.32 W/kg (head)     0.55 W/kg (body)
Models	Z00AD, Z00A	SM-A8000, SM-A800F
Price	About 300 EUR	About 250 EUR

Tests
Performance	Basemark OS II 2.0: 1090 Basemark X: 12565	Basemark OS II 2.0: 1089 Basemark X: 8838
Display		Contrast ratio: Infinite (nominal), 3.859 (sunlight)
Camera	Compare PHOTO / Compare VIDEO
Loudspeaker	Voice 62dB / Noise 61dB / Ring 67dB	Voice 66dB / Noise 66dB / Ring 75dB
Audio quality		Noise -89.3dB / Crosstalk -53.8dB
Battery (old)	Endurance rating 59h	Endurance rating 98h