Asus Zenfone 4 Pro ZS551KL vs Nokia 6.1: specs comparison

Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

Display technology

OLED versus LCD

Zenfone 4 Pro ZS551KL:

OLED

6.1:

LCD
Chipset

Zenfone 4 Pro ZS551KL:

Qualcomm MSM8998 Snapdragon 835 (10 nm)

6.1:

Qualcomm SDM630 Snapdragon 630 (14 nm)
Rear camera layout

Zenfone 4 Pro ZS551KL:

Dual

6.1:

Single
Depth

Zenfone 4 Pro ZS551KL: 0.6 mm thinner

Zenfone 4 Pro ZS551KL:

7.6 mm

6.1:

8.2 mm
Height

6.1: 8.1 mm shorter

Zenfone 4 Pro ZS551KL:

156.9 mm

6.1:

148.8 mm
Release year

Zenfone 4 Pro ZS551KL:

2017

6.1:

2018

Physical size

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

1. Zenfone 4 Pro ZS551KL

Height:

156.9 mm +8.1 mm versus 6.1
Width:

75.6 mm
Depth:

7.6 mm
2. 6.1

Height:

148.8 mm
Width:

75.8 mm
Depth:

8.2 mm +0.6 mm versus Zenfone 4 Pro ZS551KL

Weight

Bars start at zero and share a scale within this chart.

1. Zenfone 4 Pro ZS551KL

175 g

+3 g versus 6.1
2. 6.1

172 g

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

1. Zenfone 4 Pro ZS551KL

Screen diagonal:

5.5 in

Aspect ratio (height:width):

16:9

Approximate rectangular screen area:

83.4 cm²
2. 6.1

Screen diagonal:

5.5 in

Aspect ratio (height:width):

16:9

Approximate rectangular screen area:

83.4 cm²

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

Recorded RAM for Zenfone 4 Pro ZS551KL, 6.1, compared at the same storage capacity.
Storage	Zenfone 4 Pro ZS551KL	6.1
64 GB	6 GB RAM	Unknown
128 GB	6 GB RAM	Unknown

6.1: Original memory entry

32/64 GB · 3/4 GB RAM

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

1. Zenfone 4 Pro ZS551KL

NFC:: Yes
Headphone jack:: Yes
Memory card support:: See details microSD · up to 512 GB (uses SIM 2 slot)

2. 6.1

NFC:: Yes
Headphone jack:: Yes
Memory card support:: See details microSD · up to 256 GB (uses SIM 2 slot)

Battery capacity

Capacity is not battery life. No endurance test is implied.

Recorded battery capacity

Bars start at zero and share a scale within this chart.

1. Zenfone 4 Pro ZS551KL

3600 mAh

+600 mAh versus 6.1
2. 6.1

3000 mAh

Specifications

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.

1. Zenfone 4 Pro ZS551KL2. 6.1

Everyday essentials

Everyday essentials — specifications for Zenfone 4 Pro ZS551KL, 6.1.
Specification	Zenfone 4 Pro ZS551KL	6.1
Dimensions (HxWxD)	156.9 Х 75.6 Х 7.6 mm	148.8 Х 75.8 Х 8.2 mm
Weight	175 g	172 g
Technology	AMOLED	IPS LCD
Screen size	5.5" inch	5.5" inch
Screen resolution	1080 x 1920 px	1080 x 1920 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.	64/128 GB 6 GB RAM	32/64 GB 3/4 GB RAM
Memory card support	microSD up to 512 GB (uses SIM 2 slot)	microSD up to 256 GB (uses SIM 2 slot)
Battery Capacity is not battery life. No endurance test is implied.	3600 mAh Non-removable Li-Ion	3000 mAh Non-removable Li-Ion
Operating system OS	Android 7.1.1 (Nougat) upgradable to Android 8 (Oreo); ZenUI 4	Android 8.1 (Oreo) upgradable to Android 9.0 (Pie); Android One
Chipset	Qualcomm MSM8998 Snapdragon 835 (10 nm)	Qualcomm SDM630 Snapdragon 630 (14 nm)
NFC	Yes	Yes
Headphone jack	Yes	Yes

Display

Display — specifications for Zenfone 4 Pro ZS551KL, 6.1.
Specification	Zenfone 4 Pro ZS551KL	6.1
Touchscreen	capacitive touchscreen	capacitive touchscreen
Display colors	16M	16M
Screen area	83.4 cm2	82.6 cm2
Screen format	16:9 (height:width)	16:9 (height:width)
Screen to body ratio	70.3%	73.2%
PPI /points per inch/	401 PPI	403 PPI
Screen protection	Corning Gorilla Glass 5	Corning Gorilla Glass 3

Camera and Video

Camera and Video — specifications for Zenfone 4 Pro ZS551KL, 6.1.
Specification	Zenfone 4 Pro ZS551KL	6.1
Rear camera, main	12 MP Dual	16 MP Single
Camera 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	16 MP f/2.0 27mm (wide) 1.0µm PDAF
Functions	HDR	Zeiss optics Dual-LED dual-tone flash panorama HDR
Video	1080p@30fps	1080p@30fps
Front camera, selfie	8 MP Single	8 MP Single
Specifications	8 MP f/1.9 1/3.2'' 22mm (wide) 1.4µm PDAF	8 MP f/2.0 1/4'' 1.12µm

Performance

Scores marked * are historical catalogue entries. Test conditions are unspecified; no new testing is implied.

Performance — specifications for Zenfone 4 Pro ZS551KL, 6.1.
Specification	Zenfone 4 Pro ZS551KL	6.1
Processor CPU	Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)	Octa-core 2.2 GHz Cortex-A53
Graphics processor GPU	Adreno 540	Adreno 508
Antutu 7 score *	Unknown	90125
GeekBench 4 Single Core *	Unknown	869
GeekBench 4 Multi-Core *	Unknown	4102
GeekBench 4 RenderScript *	Unknown	3732
GeekBench 5 Single Core *	Unknown	174
GeekBench 5 Multi-Core *	Unknown	980

General specs

General specs — specifications for Zenfone 4 Pro ZS551KL, 6.1.
Specification	Zenfone 4 Pro ZS551KL	6.1
Release date	2017 August	2018 January
Colors	Moonlight White Pure Black	Black/Copper White/Iron Blue/Gold
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.	390 EUR	230 EUR
Battery life	Talking time- Up to 27 h 30 min (3G)	Stand by time- Up to 507 h (3G) Talking time- Up to 16 h (3G) Music play - Up to 119 h
Body build	Front/back glass (Gorilla Glass 5) & aluminum frame	Front glass Aluminum body (6000 series)

Communication and Connectivity

Communication and Connectivity — specifications for Zenfone 4 Pro ZS551KL, 6.1.
Specification	Zenfone 4 Pro ZS551KL	6.1
SIM card	Hybrid Dual SIM (Nano-SIM dual stand-by)	Hybrid Dual SIM (Nano-SIM dual stand-by)
Network	Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100 -4G - 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 LTE band 1(2100) 12(700) 18(800) 26(850) 29(700) 30(2300) 41(2500) - US Canada Brazil LTE band 1(2100) 41(2500) - India	Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 850 / 900 / 1900 / 2100 CDMA2000 1xEV-DO - Hong Kong Taiwan -4G - LTE band 1(2100) 3(1800) 5(850) 7(2600) 8(900) 20(800) 28(700) 38(2600) 40(2300) 41(2500) - EMEA & APAC LTE band 2(1900) 4(1700/2100) 12(700) 17(700) 38(2600) - LATAM LTE band 1(2100) 34(2000) 39(1900) 41(2500) - Hong Kong Taiwan
Speed	HSPA 42.2/5.76 Mbps LTE-A (3CA) Cat12 600/150 or 100 Mbps	HSPA 42.2/5.76 Mbps LTE Cat4 150/50 Mbps
GPRS	Yes	Yes
Edge	Yes	Yes
Wi-Fi	Wi-Fi 802.11 a/b/g/n/ac dual-band WiFi Direct hotspot	Wi-Fi 802.11 a/b/g/n/ac Wi-Fi Direct hotspot
GPS	Yes with A-GPS GLONASS BDS GALILEO	Yes with A-GPS GLONASS BDS
USB	Type-C 1.0 reversible connector	2.0 Type-C 1.0 reversible connector
Bluetooth	5.0 A2DP EDR LE aptX	5.0 A2DP LE
Harmful irradiation	Unknown	SAR EU - 0.94 W/kg (head) 1.82 W/kg (body)

Music and Audio

Music and Audio — specifications for Zenfone 4 Pro ZS551KL, 6.1.
Specification	Zenfone 4 Pro ZS551KL	6.1
Radio	FM radio	FM radio with RDS
Others	24-bit/192kHz audio -DTS sound -Active noise cancellation with dedicated mic	Active noise cancellation with dedicated mic

Other features

Other features — specifications for Zenfone 4 Pro ZS551KL, 6.1.
Specification	Zenfone 4 Pro ZS551KL	6.1
Dop	Sensors Fingerprint (front-mounted) accelerometer gyro proximity compass color spectrum Infrared port - Fast battery charging: 50% in 32 min	Sensors Fingerprint (rear-mounted) accelerometer gyro proximity compass - Fast battery charging 18W: 50% in 30 min

Asus Zenfone 4 Pro ZS551KL vs Nokia 6.1