Asus Zenfone 4 Pro ZS551KL vs Sonim XP8: 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

XP8:

LCD
Weight

Zenfone 4 Pro ZS551KL: 160 g lighter

Zenfone 4 Pro ZS551KL:

175 g

XP8:

335 g
Width

Zenfone 4 Pro ZS551KL: 3.9 mm narrower

Zenfone 4 Pro ZS551KL:

75.6 mm

XP8:

79.5 mm
Screen diagonal

XP8: 0.5 in smaller diagonal

Zenfone 4 Pro ZS551KL:

5.5 in

XP8:

5 in
Chipset

Zenfone 4 Pro ZS551KL:

Qualcomm MSM8998 Snapdragon 835 (10 nm)

XP8:

Qualcomm SDM630 Snapdragon 630 (14 nm)
Rear camera layout

Zenfone 4 Pro ZS551KL:

Dual

XP8:

Single

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 +4.9 mm versus XP8
Width:

75.6 mm
Depth:

7.6 mm
2. XP8

Height:

152 mm
Width:

79.5 mm +3.9 mm versus Zenfone 4 Pro ZS551KL
Depth:

18 mm +10.4 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
2. XP8

335 g

+160 g versus Zenfone 4 Pro ZS551KL

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. XP8

Screen diagonal:

5 in

Aspect ratio (height:width):

16:9

Approximate rectangular screen area:

68.9 cm²

Zenfone 4 Pro ZS551KL has approximately 21% more rectangular screen area than XP8.

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, XP8, compared at the same storage capacity.
Storage	Zenfone 4 Pro ZS551KL	XP8
64 GB	6 GB RAM	Unknown
128 GB	6 GB RAM	Unknown

XP8: Original memory entry

64 GB · 512GB 4GB

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. XP8

NFC:: Yes
Headphone jack:: Yes
Memory card support:: See details microSD · up to 128 GB

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
2. XP8

4900 mAh

+1300 mAh versus Zenfone 4 Pro ZS551KL

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. XP8

Everyday essentials

Everyday essentials — specifications for Zenfone 4 Pro ZS551KL, XP8.
Specification	Zenfone 4 Pro ZS551KL	XP8
Dimensions (HxWxD)	156.9 Х 75.6 Х 7.6 mm	152 Х 79.5 Х 18 mm
Weight	175 g	335 g
Technology	AMOLED	IPS LCD
Screen size	5.5" inch	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	64 GB 512GB 4GB
Memory card support	microSD up to 512 GB (uses SIM 2 slot)	microSD up to 128 GB
Battery Capacity is not battery life. No endurance test is implied.	3600 mAh Non-removable Li-Ion	4900 mAh Removable Li-Ion
Operating system OS	Android 7.1.1 (Nougat) upgradable to Android 8 (Oreo); ZenUI 4	Android 7.0 (Nougat)
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, XP8.
Specification	Zenfone 4 Pro ZS551KL	XP8
Touchscreen	capacitive touchscreen	capacitive touchscreen
Display colors	16M	16M
Screen area	83.4 cm2	68.9 cm2
Screen format	16:9 (height:width)	16:9 (height:width)
Screen to body ratio	70.3%	57.0%
PPI /points per inch/	401 PPI	441 PPI
Screen protection	Corning Gorilla Glass 5	Corning Gorilla Glass 3

Camera and Video

Camera and Video — specifications for Zenfone 4 Pro ZS551KL, XP8.
Specification	Zenfone 4 Pro ZS551KL	XP8
Rear camera, main	12 MP Dual	12 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	12 MP PDAF
Functions	HDR	LED flash HDR panorama
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

Performance

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

Performance — specifications for Zenfone 4 Pro ZS551KL, XP8.
Specification	Zenfone 4 Pro ZS551KL	XP8
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	71820

General specs

General specs — specifications for Zenfone 4 Pro ZS551KL, XP8.
Specification	Zenfone 4 Pro ZS551KL	XP8
Release date	2017 August	2018 April
Colors	Moonlight White Pure Black	Black
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.	390 EUR	700 EUR
Battery life	Talking time- Up to 27 h 30 min (3G)	Stand by time- Up to 720 h Talking time- Up to 30 h Music play - Up to 70 h
Body build	Front/back glass (Gorilla Glass 5) & aluminum frame	Unknown

Communication and Connectivity

Communication and Connectivity — specifications for Zenfone 4 Pro ZS551KL, XP8.
Specification	Zenfone 4 Pro ZS551KL	XP8
SIM card	Hybrid Dual SIM (Nano-SIM dual stand-by)	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 CDMA 800 / 1900 -3G - HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 CDMA2000 1xEV-DO -4G - LTE band 1(2100) 2(1900) 3(1800) 4(1700/2100) 5(850) 7(2600) 8(900) 12(700) 13(700) 14(700) 20(800) 25(1900) 26(850) 28(700) 29(700) 30(2300) 38(2600) 40(2300) 41(2500) 66(1700/2100)
Speed	HSPA 42.2/5.76 Mbps LTE-A (3CA) Cat12 600/150 or 100 Mbps	HSPA 42.2/5.76 Mbps LTE-A (3CA) Cat12 600/150 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 dual-band WiFi Direct hotspot
GPS	Yes with A-GPS GLONASS BDS GALILEO	Yes with A-GPS GLONASS
USB	Type-C 1.0 reversible connector	2.0 Type-C 1.0 reversible connector; magnetic connector
Bluetooth	5.0 A2DP EDR LE aptX	5.0 A2DP EDR LE

Music and Audio

Music and Audio — specifications for Zenfone 4 Pro ZS551KL, XP8.
Specification	Zenfone 4 Pro ZS551KL	XP8
Radio	FM radio	FM radio
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, XP8.
Specification	Zenfone 4 Pro ZS551KL	XP8
Dop	Sensors Fingerprint (front-mounted) accelerometer gyro proximity compass color spectrum Infrared port - Fast battery charging: 50% in 32 min	Sensors Accelerometer gyro proximity compass barometer - Fast battery charging (Quick Charge 4.0) - IP69 dust proof and water resistant over 1 meter and 30 minutes -MIL-STD-810G

Asus Zenfone 4 Pro ZS551KL vs Sonim XP8