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Asus Zenfone Selfie ZD551KL
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Xiaomi Mi A1 (Mi 5X)
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Asus Zenfone Selfie ZD551KL MORE PICTURES
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Asus Zenfone Selfie ZD551KL

Xiaomi Mi A1 (Mi 5X)
Our video review on Youtube
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, 2, 3, 5, 7, 8, 20 - Global 1, 3, 5, 7, 8, 20, 38, 40
  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 Cat4 150/50 Mbps HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Launch
Announced 2015, June. Released 2015, August 2017, September
Status Discontinued Available. Released 2017, September
Body
Dimensions 156.5 x 77.2 x 10.8 mm (6.16 x 3.04 x 0.43 in) 155.4 x 75.8 x 7.3 mm (6.12 x 2.98 x 0.29 in)
Weight 170 g (6.00 oz) 165 g (5.82 oz)
Build Glass front (Gorilla Glass 4), plastic back, plastic frame Glass front (Gorilla Glass 3), aluminum back, aluminum frame
SIM Dual SIM (Micro-SIM, dual stand-by) Hybrid Dual SIM (Nano-SIM, dual stand-by)
Display
Type IPS LCD IPS LCD
Size 5.5 inches, 82.6 cm2 (~68.3% screen-to-body ratio) 5.5 inches, 82.6 cm2 (~70.1% screen-to-body ratio)
Resolution 1080 x 1920 pixels, 16:9 ratio (~403 ppi density) 1080 x 1920 pixels, 16:9 ratio (~403 ppi density)
Protection Corning Gorilla Glass 4, oleophobic coating Corning Gorilla Glass 3
Platform
OS Android 5.0 (Lollipop), upgradable to 6.0 (Marshmallow), ZenUI Android 7.1.2 (Nougat), upgradable to Android 9.0 (Pie), Android One
Chipset Qualcomm MSM8939 Snapdragon 615 (28 nm) Qualcomm MSM8953 Snapdragon 625 (14 nm)
CPU Octa-core (4x1.7 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53) Octa-core 2.0 GHz Cortex-A53
GPU Adreno 405 Adreno 506
Memory
Card slot microSDXC (dedicated slot) microSDXC (uses shared SIM slot)
Internal 16GB 2GB RAM, 32GB 3GB RAM 32GB 4GB RAM, 64GB 4GB RAM
 eMMC 4.5 eMMC 5.1
Main Camera
Modules 13 MP, f/2.0, 28mm (wide), 1/3.0", Laser AF 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 Dual-LED dual-tone flash, panorama, HDR Dual-LED dual-tone flash, HDR, panorama
Video 1080p@30fps 4K@30fps, 1080p@30fps, 720p@120fps
Selfie Camera
Modules 13 MP, f/2.2, 1/3.1", 1.12µm, AF 5 MP
Features Dual-LED dual-tone flash
Video 1080p@30fps 1080p@30fps
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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
Bluetooth 4.0, A2DP, EDR 4.2, A2DP, LE
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
NFC No No
Infrared port No Yes
Radio FM radio, RDS FM radio
USB microUSB 2.0, OTG USB Type-C 2.0
Features
Sensors Accelerometer, gyro, proximity, compass Fingerprint (rear-mounted), accelerometer, gyro, proximity
Battery
Type Li-Po 3000 mAh, removable Li-Po 3080 mAh, non-removable
Charging 10W wired
Misc
Colors Pure White, Chic Pink, Aqua Blue Black, Gold, Rose Gold, Red
SAR 1.75 W/kg (head)     0.76 W/kg (body)    
Models Z00UD, Z00UDH, Z00UDC, Z00UDB MDG2, MDI2
Price About 280 EUR About 170 EUR
Tests
Performance Basemark OS II 2.0: 883
Basemark X: 4915		 GeekBench: 4292 (v4.4)
GFXBench: 3.5fps (ES 3.1 onscreen)
Display Contrast ratio: 928:1 (nominal), 1.680 (sunlight) Contrast ratio: 1570:1 (nominal), 2.689 (sunlight)
Camera Compare PHOTO / Compare VIDEO
Loudspeaker Voice 65dB / Noise 66dB / Ring 75dB Voice 74dB / Noise 73dB / Ring 90dB
Audio quality Noise -92.1dB / Crosstalk -92.5dB Noise -91.0dB / Crosstalk -82.5dB
Battery (old) Endurance rating 63h Endurance rating 87h

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