Asus Zenfone 4 Pro ZS551KL vs Sonim XP6: 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.

Weight

Zenfone 4 Pro ZS551KL: 95 g lighter

Zenfone 4 Pro ZS551KL:

175 g

XP6:

270 g
Width

XP6: 11.1 mm narrower

Zenfone 4 Pro ZS551KL:

75.6 mm

XP6:

64.5 mm
Screen diagonal

XP6: 2.87 in smaller diagonal

Zenfone 4 Pro ZS551KL:

5.5 in

XP6:

2.63 in
Chipset

Zenfone 4 Pro ZS551KL:

Qualcomm MSM8998 Snapdragon 835 (10 nm)

XP6:

Qualcomm MSM8926 Snapdragon 400 (28 nm)
Rear camera layout

Zenfone 4 Pro ZS551KL:

Dual

XP6:

Single
Depth

Zenfone 4 Pro ZS551KL: 12.9 mm thinner

Zenfone 4 Pro ZS551KL:

7.6 mm

XP6:

20.5 mm

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 +19.9 mm versus XP6
Width:

75.6 mm +11.1 mm versus XP6
Depth:

7.6 mm
2. XP6

Height:

137 mm
Width:

64.5 mm
Depth:

20.5 mm +12.9 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. XP6

270 g

+95 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. XP6

Screen diagonal:

2.63 in

Aspect ratio (height:width):

4:3

Approximate rectangular screen area:

21.4 cm²

Zenfone 4 Pro ZS551KL has approximately 289.3% more rectangular screen area than XP6.

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, XP6, compared at the same storage capacity.
Storage	Zenfone 4 Pro ZS551KL	XP6
8 GB	Not recorded	1 GB RAM
64 GB	6 GB RAM	Not recorded
128 GB	6 GB RAM	Not recorded

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. XP6

NFC:: Unknown
Headphone jack:: Yes
Memory card support:: No

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. XP6

4800 mAh

+1200 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. XP6

Everyday essentials

Everyday essentials — specifications for Zenfone 4 Pro ZS551KL, XP6.
Specification	Zenfone 4 Pro ZS551KL	XP6
Dimensions (HxWxD)	156.9 Х 75.6 Х 7.6 mm	137 Х 64.5 Х 20.5 mm
Weight	175 g	270 g
Technology	AMOLED	Unknown
Screen size	5.5" inch	2.63" inch
Screen resolution	1080 x 1920 px	320 x 432 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	8 GB 1 GB RAM
Memory card support	microSD up to 512 GB (uses SIM 2 slot)	No
Battery Capacity is not battery life. No endurance test is implied.	3600 mAh Non-removable Li-Ion	4800 mAh Non-removable Li-Ion
Operating system OS	Android 7.1.1 (Nougat) upgradable to Android 8 (Oreo); ZenUI 4	Android 4.4.2 (KitKat)
Chipset	Qualcomm MSM8998 Snapdragon 835 (10 nm)	Qualcomm MSM8926 Snapdragon 400 (28 nm)
NFC	Yes	Unknown
Headphone jack	Yes	Yes

Display

Display — specifications for Zenfone 4 Pro ZS551KL, XP6.
Specification	Zenfone 4 Pro ZS551KL	XP6
Touchscreen	capacitive touchscreen	capacitive touchscreen
Display colors	16M	256K
Screen area	83.4 cm2	21.3 cm2
Screen format	16:9 (height:width)	4:3 (height:width)
Screen to body ratio	70.3%	24.2%
PPI /points per inch/	401 PPI	204 PPI
Screen protection	Corning Gorilla Glass 5	Yes

Camera and Video

Camera and Video — specifications for Zenfone 4 Pro ZS551KL, XP6.
Specification	Zenfone 4 Pro ZS551KL	XP6
Rear camera, main	12 MP Dual	5 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	5 MP
Functions	HDR	Unknown
Video	1080p@30fps	720p@30fps
Front camera, selfie	8 MP Single	0 MP,
Specifications	8 MP f/1.9 1/3.2'' 22mm (wide) 1.4µm PDAF	Unknown

Performance

Performance — specifications for Zenfone 4 Pro ZS551KL, XP6.
Specification	Zenfone 4 Pro ZS551KL	XP6
Processor CPU	Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)	Quad-core 1.2 GHz Cortex-A7
Graphics processor GPU	Adreno 540	Adreno 305

General specs

General specs — specifications for Zenfone 4 Pro ZS551KL, XP6.
Specification	Zenfone 4 Pro ZS551KL	XP6
Release date	2017 August	2014 November
Colors	Moonlight White Pure Black	Black
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.	390 EUR	490 EUR
Battery life	Talking time- Up to 27 h 30 min (3G)	Stand by time- Up to 1080 h Talking time- Up to 40 h
Body build	Front/back glass (Gorilla Glass 5) & aluminum frame	Unknown

Communication and Connectivity

Communication and Connectivity — specifications for Zenfone 4 Pro ZS551KL, XP6.
Specification	Zenfone 4 Pro ZS551KL	XP6
SIM card	Hybrid Dual SIM (Nano-SIM dual stand-by)	Micro-SIM
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 -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE band 1(2100) 2(1900) 4(1700/2100) 5(850) 7(2600) 8(900) 12(700) 17(700)
Speed	HSPA 42.2/5.76 Mbps LTE-A (3CA) Cat12 600/150 or 100 Mbps	HSPA LTE
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 dual-band hotspot
GPS	Yes with A-GPS GLONASS BDS GALILEO	Yes with A-GPS GLONASS
USB	Type-C 1.0 reversible connector	microUSB 2.0
Bluetooth	5.0 A2DP EDR LE aptX	4.0 A2DP LE

Music and Audio

Music and Audio — specifications for Zenfone 4 Pro ZS551KL, XP6.
Specification	Zenfone 4 Pro ZS551KL	XP6
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, XP6.
Specification	Zenfone 4 Pro ZS551KL	XP6
Dop	Sensors Fingerprint (front-mounted) accelerometer gyro proximity compass color spectrum Infrared port - Fast battery charging: 50% in 32 min	Sensors Accelerometer proximity - MIL-STD-810G compliant -IP68/IP69 dust/water proof (up to 1.8m for 30 min) -Drop-to-concrete resistance from up to 2m -Operational range -20°C to +55°C -Flashlight

Asus Zenfone 4 Pro ZS551KL vs Sonim XP6