Asus Zenfone 4 Pro ZS551KL vs Celkon A402: 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

A402: 71 g lighter

Zenfone 4 Pro ZS551KL:

175 g

A402:

104 g
Width

A402: 11.6 mm narrower

Zenfone 4 Pro ZS551KL:

75.6 mm

A402:

64 mm
Screen diagonal

A402: 1.5 in smaller diagonal

Zenfone 4 Pro ZS551KL:

5.5 in

A402:

4 in
Chipset

Zenfone 4 Pro ZS551KL:

Qualcomm MSM8998 Snapdragon 835 (10 nm)

A402:

Spreadtrum 7715
Rear camera layout

Zenfone 4 Pro ZS551KL:

Dual

A402:

Single
Depth

Zenfone 4 Pro ZS551KL: 2.6 mm thinner

Zenfone 4 Pro ZS551KL:

7.6 mm

A402:

10.2 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 +31.4 mm versus A402
Width:

75.6 mm +11.6 mm versus A402
Depth:

7.6 mm
2. A402

Height:

125.5 mm
Width:

64 mm
Depth:

10.2 mm +2.6 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

+71 g versus A402
2. A402

104 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. A402

Screen diagonal:

4 in

Aspect ratio (height:width):

5:3

Approximate rectangular screen area:

45.5 cm²

Zenfone 4 Pro ZS551KL has approximately 83.1% more rectangular screen area than A402.

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, A402, compared at the same storage capacity.
Storage	Zenfone 4 Pro ZS551KL	A402
64 GB	6 GB RAM	Unknown
128 GB	6 GB RAM	Unknown

A402: Original memory entry

4 GB · 512 MB 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. A402

NFC:: Unknown
Headphone jack:: Yes
Memory card support:: See details microSD · up to 32 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

+1600 mAh versus A402
2. A402

2000 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. A402

Everyday essentials

Everyday essentials — specifications for Zenfone 4 Pro ZS551KL, A402.
Specification	Zenfone 4 Pro ZS551KL	A402
Dimensions (HxWxD)	156.9 Х 75.6 Х 7.6 mm	125.5 Х 64 Х 10.2 mm
Weight	175 g	104 g
Technology	AMOLED	Unknown
Screen size	5.5" inch	4" inch
Screen resolution	1080 x 1920 px	480 x 800 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	4 GB 512 MB RAM
Memory card support	microSD up to 512 GB (uses SIM 2 slot)	microSD up to 32 GB
Battery Capacity is not battery life. No endurance test is implied.	3600 mAh Non-removable Li-Ion	2000 mAh 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)	Spreadtrum 7715
NFC	Yes	Unknown
Headphone jack	Yes	Yes

Display

Display — specifications for Zenfone 4 Pro ZS551KL, A402.
Specification	Zenfone 4 Pro ZS551KL	A402
Touchscreen	capacitive touchscreen	capacitive touchscreen
Display colors	16M	Unknown
Screen area	83.4 cm2	45.5 cm2
Screen format	16:9 (height:width)	5:3 (height:width)
Screen to body ratio	70.3%	56.7%
PPI /points per inch/	401 PPI	233 PPI
Screen protection	Corning Gorilla Glass 5	Unknown

Camera and Video

Camera and Video — specifications for Zenfone 4 Pro ZS551KL, A402.
Specification	Zenfone 4 Pro ZS551KL	A402
Rear camera, main	12 MP Dual	3.15 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	3.15 MP
Functions	HDR	LED flash
Video	1080p@30fps	Yes
Front camera, selfie	8 MP Single	1.3 MP Single
Specifications	8 MP f/1.9 1/3.2'' 22mm (wide) 1.4µm PDAF	1.3 MP

Performance

Performance — specifications for Zenfone 4 Pro ZS551KL, A402.
Specification	Zenfone 4 Pro ZS551KL	A402
Processor CPU	Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)	1.2 GHz
Graphics processor GPU	Adreno 540	Mali-400

General specs

General specs — specifications for Zenfone 4 Pro ZS551KL, A402.
Specification	Zenfone 4 Pro ZS551KL	A402
Release date	2017 August	2015 June
Colors	Moonlight White Pure Black	White Black Blue Silver
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.	390 EUR	Unknown
Battery life	Talking time- Up to 27 h 30 min (3G)	Unknown
Body build	Front/back glass (Gorilla Glass 5) & aluminum frame	Unknown

Communication and Connectivity

Communication and Connectivity — specifications for Zenfone 4 Pro ZS551KL, A402.
Specification	Zenfone 4 Pro ZS551KL	A402
SIM card	Hybrid Dual SIM (Nano-SIM dual stand-by)	Dual 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 900 / 1800 - SIM 1 & SIM 2
Speed	HSPA 42.2/5.76 Mbps LTE-A (3CA) Cat12 600/150 or 100 Mbps	Yes 384 kbps
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 b/g/n
GPS	Yes with A-GPS GLONASS BDS GALILEO	Yes
USB	Type-C 1.0 reversible connector	microUSB 2.0
Bluetooth	5.0 A2DP EDR LE aptX	4.0 A2DP
Harmful irradiation	Unknown	SAR EU - 0.46 W/kg (head) 0.82 W/kg (body)

Music and Audio

Music and Audio — specifications for Zenfone 4 Pro ZS551KL, A402.
Specification	Zenfone 4 Pro ZS551KL	A402
Radio	FM radio	FM radio
Others	24-bit/192kHz audio -DTS sound -Active noise cancellation with dedicated mic	Unknown

Other features

Other features — specifications for Zenfone 4 Pro ZS551KL, A402.
Specification	Zenfone 4 Pro ZS551KL	A402
Dop	Sensors Fingerprint (front-mounted) accelerometer gyro proximity compass color spectrum Infrared port - Fast battery charging: 50% in 32 min	Sensors Accelerometer

Asus Zenfone 4 Pro ZS551KL vs Celkon A402