Asus Zenfone 4 Pro ZS551KL vs Lava Iris 401e

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.

  • Weight

    Iris 401e: 42 g lighter

    Zenfone 4 Pro ZS551KL:
    175 g
    Iris 401e:
    133 g
  • Width

    Iris 401e: 12.6 mm narrower

    Zenfone 4 Pro ZS551KL:
    75.6 mm
    Iris 401e:
    63 mm
  • Screen diagonal

    Iris 401e: 1.5 in smaller diagonal

    Zenfone 4 Pro ZS551KL:
    5.5 in
    Iris 401e:
    4 in
  • Rear camera layout

    Zenfone 4 Pro ZS551KL:
    Dual
    Iris 401e:
    Single
  • Depth

    Zenfone 4 Pro ZS551KL: 2.4 mm thinner

    Zenfone 4 Pro ZS551KL:
    7.6 mm
    Iris 401e:
    10 mm
  • Height

    Iris 401e: 32.9 mm shorter

    Zenfone 4 Pro ZS551KL:
    156.9 mm
    Iris 401e:
    124 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. 1. Zenfone 4 Pro ZS551KL

    Height:
    156.9 mm +32.9 mm versus Iris 401e
    Width:
    75.6 mm +12.6 mm versus Iris 401e
    Depth:
    7.6 mm
  2. 2. Iris 401e

    Height:
    124 mm
    Width:
    63 mm
    Depth:
    10 mm +2.4 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

    +42 g versus Iris 401e

  2. 2. Iris 401e

    133 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. Iris 401e

    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 Iris 401e.

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, Iris 401e, compared at the same storage capacity.
StorageZenfone 4 Pro ZS551KLIris 401e
64 GB 6 GB RAM Unknown
128 GB 6 GB RAM Unknown
Iris 401e: Original memory entry

512 MB · 256 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. Iris 401e

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. 1. Zenfone 4 Pro ZS551KL

    3600 mAh

    +2100 mAh versus Iris 401e

  2. 2. Iris 401e

    1500 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. Iris 401e

Everyday essentials
Everyday essentials — specifications for Zenfone 4 Pro ZS551KL, Iris 401e.
SpecificationZenfone 4 Pro ZS551KLIris 401e
Dimensions (HxWxD)
  • 156.9 Х 75.6 Х 7.6 mm
  • 124 Х 63 Х 10 mm
Weight
  • 175 g
  • 133 g
Technology
  • AMOLED
  • TFT
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
  • 512 MB
  • 256 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
  • 1500 mAh
  • Removable Li-Ion
Operating system OS
  • Android 7.1.1 (Nougat)
  • upgradable to Android 8 (Oreo); ZenUI 4
  • Android 2.3.5 (Gingerbread)
Chipset
  • Qualcomm MSM8998 Snapdragon 835 (10 nm)
Unknown
NFC
  • Yes
Unknown
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Zenfone 4 Pro ZS551KL, Iris 401e.
SpecificationZenfone 4 Pro ZS551KLIris 401e
Touchscreen
  • capacitive touchscreen
  • touchscreen
Display colors
  • 16M
  • 256K
Screen area
  • 83.4 cm2
  • 45.5 cm2
Screen format
  • 16:9 (height:width)
  • 5:3 (height:width)
Screen to body ratio
  • 70.3%
  • 58.3%
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, Iris 401e.
SpecificationZenfone 4 Pro ZS551KLIris 401e
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
Unknown
Video
  • 1080p@30fps
  • Yes
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, Iris 401e.
SpecificationZenfone 4 Pro ZS551KLIris 401e
Processor CPU
  • Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)
  • 1.0 GHz
Graphics processor GPU
  • Adreno 540
Unknown
General specs
General specs — specifications for Zenfone 4 Pro ZS551KL, Iris 401e.
SpecificationZenfone 4 Pro ZS551KLIris 401e
Release date
  • 2017
  • August
  • 2013
  • June
Colors
  • Moonlight White
  • Pure Black
  • Grey/Blue
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 390 EUR
  • 50 EUR
Battery life
  • Talking time- Up to 27 h 30 min (3G)
  • Stand by time- Up to 210 h Talking time- Up to 10 h 40 min
Body build
  • Front/back glass (Gorilla Glass 5) & aluminum frame
Unknown
Communication and Connectivity
Communication and Connectivity — specifications for Zenfone 4 Pro ZS551KL, Iris 401e.
SpecificationZenfone 4 Pro ZS551KLIris 401e
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
Unknown
Speed
  • HSPA 42.2/5.76 Mbps
  • LTE-A (3CA) Cat12 600/150 or 100 Mbps
Unknown
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
  • A-GPS only
USB
  • Type-C 1.0 reversible connector
  • Proprietary
Bluetooth
  • 5.0
  • A2DP
  • EDR
  • LE
  • aptX
  • Yes
Music and Audio
Music and Audio — specifications for Zenfone 4 Pro ZS551KL, Iris 401e.
SpecificationZenfone 4 Pro ZS551KLIris 401e
Radio
  • FM radio
  • FM radio
Others
  • 24-bit/192kHz audio -DTS sound -Active noise cancellation with dedicated mic
  • Flashlight
Other features
Other features — specifications for Zenfone 4 Pro ZS551KL, Iris 401e.
SpecificationZenfone 4 Pro ZS551KLIris 401e
Dop
  • Sensors Fingerprint (front-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass
  • color spectrum
  • Infrared port - Fast battery charging: 50% in 32 min
  • Sensors Accelerometer For India