Asus Zenfone 4 Pro ZS551KL smartphone runs on Android 7.1.1 (Nougat), upgradable to Android 8 (Oreo); ZenUI 4 operating system. The phone is powered by Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo) processor. It has 64/128 GB, 6 GB RAM. Internal storage options which can be extended with the help of microSD, up to 512 GB (uses SIM 2 slot). The smartphone has a AMOLED providing, Screen-to-Body Ratio of 70.3%. The smartphone is fueled with a 3600 mAh, Non-removable Li-Ion. The main camera of the smartphone consists of a 12 MP, Dual. The sensors include Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, color spectrum , Infrared port. Connectivity features in the smartphone include Bluetooth, A-GPS, GLONASS, BDS, GALILEO, Wi-Fi, NFC, 3.5 mm Jack and more. The Asus Zenfone 4 Pro ZS551KL are available in various colors such as Moonlight white, Pure Black. It measures 156.9 x 75.6 x 7.6 mm and weighs 175 g.

Hardware and OS Asus Zenfone 4 Pro ZS551KL
Operating system:	Android 7.1.1 (Nougat), upgradable to Android 8 (Oreo); ZenUI 4
Processor:	Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)
Chipset:	Qualcomm MSM8998 Snapdragon 835 (10 nm)
GPU:	Adreno 540
Internal memory:	64/128 GB, 6 GB RAM
External memory:	microSD, up to 512 GB (uses SIM 2 slot)
Display Asus Zenfone 4 Pro ZS551KL
Type:	AMOLED
Size:	5.5" inc
Resolution:	1080 x 1920 px
Protection:	Corning Gorilla Glass 5
Touchscreen:	capacitive touchscreen
Screen-to-Body Ratio:	70.3%
Display area:	83.4 cm²
Display aspect ratio:	16:9 (height:width)
Pixel Density:	401 PPI
Colors:	16M
Connectivity Asus Zenfone 4 Pro ZS551KL
2G Network:	GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network:	HSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100
4G Network:	LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 17(700), 19(800), 20(800), 28(700), 38(2600), 39(1900), 40(2300), 41(2500) - Global, Taiwan
Wi-Fi:	Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot
Network:	GSM / HSPA / LTE
SIM card:	Hybrid Dual SIM (Nano-SIM, dual stand-by)
Bluetooth:	5.0, A2DP, EDR, LE, aptX
Edge:	Yes
GPRS:	Yes
GPS:	Yes, with A-GPS, GLONASS, BDS, GALILEO
NFC:	Yes
Speed:	HSPA 42.2/5.76 Mbps, LTE-A (3CA) Cat12 600/150 or 100 Mbps
USB:	Type-C 1.0 reversible connector
Camera Asus Zenfone 4 Pro ZS551KL
Main camera:	12 MP, Dual
Specs:	12 MP, f/1.7, 25mm (wide), 1/2.55', 1.4µm, 4-axis OIS, dual pixel PDAF & laser AF -16 MP, 50mm (telephoto), 1/3.1', 1.0µm, 2x optical zoom, AF
Features:	LED flash, HDR, panorama
Features:	HDR
Video:	2160p@30fps, 1080p@30/60fps, 1080p@120fps, 720p@240fps
Selfie camera:	8 MP, Single
Specs:	8 MP, f/1.9, 1/3.2', 22mm (wide), 1.4µm, PDAF
Video:	1080p@30fps
Multimedia Asus Zenfone 4 Pro ZS551KL
3.5 mm Jack:	Yes
Radio:	FM radio
Design Asus Zenfone 4 Pro ZS551KL
Colors:	Moonlight white, Pure Black
Body build:	Front/back glass (Gorilla Glass 5) & aluminum frame
Dimensions:	156.9 x 75.6 x 7.6 mm
Weight:	175 g
Battery Asus Zenfone 4 Pro ZS551KL
Battery capacity:	3600 mAh, Non-removable Li-Ion
Battery life:	Talking time- Up to 27 h 30 min (3G)
Other Asus Zenfone 4 Pro ZS551KL
Release date:	2017, August
Sensors:	Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, color spectrum , Infrared port

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