Asus Zenfone 4 Pro ZS551KL vs OnePlus 2

Compare recorded specifications, size and practical differences.

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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
    2:
    LCD
  • Chipset

    Zenfone 4 Pro ZS551KL:
    Qualcomm MSM8998 Snapdragon 835 (10 nm)
    2:
    Qualcomm MSM8994 Snapdragon 810 (20 nm)
  • Rear camera layout

    Zenfone 4 Pro ZS551KL:
    Dual
    2:
    Single
  • Depth

    Zenfone 4 Pro ZS551KL: 2.3 mm thinner

    Zenfone 4 Pro ZS551KL:
    7.6 mm
    2:
    9.9 mm
  • Height

    2: 5.1 mm shorter

    Zenfone 4 Pro ZS551KL:
    156.9 mm
    2:
    151.8 mm
  • Release year

    Zenfone 4 Pro ZS551KL:
    2017
    2:
    2015

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. 1. Zenfone 4 Pro ZS551KL

    Height:
    156.9 mm +5.1 mm versus 2
    Width:
    75.6 mm
    Depth:
    7.6 mm
  2. 2. 2

    Height:
    151.8 mm
    Width:
    74.9 mm
    Depth:
    9.9 mm +2.3 mm versus Zenfone 4 Pro ZS551KL

Weight

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

  1. 1. Zenfone 4 Pro ZS551KL

    175 g

  2. 2. 2

    175 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. 1. Zenfone 4 Pro ZS551KL

    Screen diagonal:
    5.5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    83.4 cm²
  2. 2. 2

    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, 2, compared at the same storage capacity.
StorageZenfone 4 Pro ZS551KL2
64 GB 6 GB RAM Unknown
128 GB 6 GB RAM Unknown
2: Original memory entry

16 GB · 3 GB RAM64 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. 2

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. 1. Zenfone 4 Pro ZS551KL

    3600 mAh

    +300 mAh versus 2

  2. 2. 2

    3300 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. 2

Everyday essentials
Everyday essentials — specifications for Zenfone 4 Pro ZS551KL, 2.
SpecificationZenfone 4 Pro ZS551KL2
Dimensions (HxWxD)
  • 156.9 Х 75.6 Х 7.6 mm
  • 151.8 Х 74.9 Х 9.9 mm
Weight
  • 175 g
  • 175 g
Technology
  • AMOLED
  • LTPS 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
  • 16 GB
  • 3 GB RAM64 GB
  • 512GB 4GB
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
  • 3300 mAh
  • Non-removable Li-Po
Operating system OS
  • Android 7.1.1 (Nougat)
  • upgradable to Android 8 (Oreo); ZenUI 4
  • Android 5.1 (Lollipop)
  • upgradable to 6.0.1 (Marshmallow); Oxygen 3.5.6 UI
Chipset
  • Qualcomm MSM8998 Snapdragon 835 (10 nm)
  • Qualcomm MSM8994 Snapdragon 810 (20 nm)
NFC
  • Yes
Unknown
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Zenfone 4 Pro ZS551KL, 2.
SpecificationZenfone 4 Pro ZS551KL2
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 83.4 cm2
  • 83.4 cm2
Screen format
  • 16:9 (height:width)
  • 16:9 (height:width)
Screen to body ratio
  • 70.3%
  • 73.3%
PPI /points per inch/
  • 401 PPI
  • 401 PPI
Screen protection
  • Corning Gorilla Glass 5
  • Corning Gorilla Glass 3
Camera and Video
Camera and Video — specifications for Zenfone 4 Pro ZS551KL, 2.
SpecificationZenfone 4 Pro ZS551KL2
Rear camera, main
  • 12 MP
  • Dual
  • 13 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
  • 13 MP
  • f/2.0
  • 1/2.6''
  • 1.3µm
  • OIS
  • laser AF
Functions
  • HDR
  • Dual-LED flash
  • panorama
  • HDR
Video
  • 1080p@30fps
  • 720p@30fps
Front camera, selfie
  • 8 MP
  • Single
  • 5 MP
  • Single
Specifications
  • 8 MP
  • f/1.9
  • 1/3.2''
  • 22mm (wide)
  • 1.4µm
  • PDAF
  • 5 MP
  • f/2.4
Performance

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

Performance — specifications for Zenfone 4 Pro ZS551KL, 2.
SpecificationZenfone 4 Pro ZS551KL2
Processor CPU
  • Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)
  • Octa-core (4x1.56 GHz Cortex-A53 & 4x1.82 GHz Cortex-A57)
Graphics processor GPU
  • Adreno 540
  • Adreno 430
Antutu 7 score * Unknown
  • 91253
GeekBench 4 Single Core * Unknown
  • 1050
GeekBench 4 Multi-Core * Unknown
  • 2740
GeekBench 4 RenderScript * Unknown
  • 3510
GeekBench 4 Battery * Unknown
  • 1209
GeekBench 5 Single Core * Unknown
  • 208
GeekBench 5 Multi-Core * Unknown
  • 591
General specs
General specs — specifications for Zenfone 4 Pro ZS551KL, 2.
SpecificationZenfone 4 Pro ZS551KL2
Release date
  • 2017
  • August
  • 2015
  • July
Colors
  • Moonlight White
  • Pure Black
  • Sandstone Black
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 390 EUR
  • 300 EUR
Battery life
  • Talking time- Up to 27 h 30 min (3G)
Unknown
Body build
  • Front/back glass (Gorilla Glass 5) & aluminum frame
  • aluminum frame
  • plastic back
Communication and Connectivity
Communication and Connectivity — specifications for Zenfone 4 Pro ZS551KL, 2.
SpecificationZenfone 4 Pro ZS551KL2
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 -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 5(850)
  • 7(2600)
  • 8(900)
  • 20(800)
  • 38(2600)
  • 40(2300)
  • 41(2500)
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
  • DLNA
  • 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
Bluetooth
  • 5.0
  • A2DP
  • EDR
  • LE
  • aptX
  • 4.1
  • A2DP
Harmful irradiation Unknown
  • SAR EU - 0.43 W/kg (head) 0.20 W/kg (body)
Music and Audio
Music and Audio — specifications for Zenfone 4 Pro ZS551KL, 2.
SpecificationZenfone 4 Pro ZS551KL2
Radio
  • FM radio
  • No
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, 2.
SpecificationZenfone 4 Pro ZS551KL2
Dop
  • Sensors Fingerprint (front-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass
  • color spectrum
  • Infrared port - Fast battery charging: 50% in 32 min
  • Sensors Fingerprint (front-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass - Also known as OnePlus Two