Asus Zenfone 4 Pro ZS551KL vs QMobile E1

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
    E1:
    LCD
  • Width

    E1: 3.6 mm narrower

    Zenfone 4 Pro ZS551KL:
    75.6 mm
    E1:
    72 mm
  • Screen diagonal

    E1: 0.5 in smaller diagonal

    Zenfone 4 Pro ZS551KL:
    5.5 in
    E1:
    5 in
  • Chipset

    Zenfone 4 Pro ZS551KL:
    Qualcomm MSM8998 Snapdragon 835 (10 nm)
    E1:
    Mediatek MT6735P (28 nm)
  • Rear camera layout

    Zenfone 4 Pro ZS551KL:
    Dual
    E1:
    Single
  • Depth

    Zenfone 4 Pro ZS551KL: 1.3 mm thinner

    Zenfone 4 Pro ZS551KL:
    7.6 mm
    E1:
    8.9 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 +13.1 mm versus E1
    Width:
    75.6 mm +3.6 mm versus E1
    Depth:
    7.6 mm
    Weight:
    175 g
  2. 2. E1

    Height:
    143.8 mm
    Width:
    72 mm
    Depth:
    8.9 mm +1.3 mm versus Zenfone 4 Pro ZS551KL
    Weight:
    Unknown

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. E1

    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 E1.

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, E1, compared at the same storage capacity.
StorageZenfone 4 Pro ZS551KLE1
16 GB Not recorded 3 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. E1

NFC:
Unknown
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. 1. Zenfone 4 Pro ZS551KL

    3600 mAh

  2. 2. E1

    4000 mAh

    +400 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. E1

Everyday essentials
Everyday essentials — specifications for Zenfone 4 Pro ZS551KL, E1.
SpecificationZenfone 4 Pro ZS551KLE1
Dimensions (HxWxD)
  • 156.9 Х 75.6 Х 7.6 mm
  • 143.8 Х 72 Х 8.9 mm
Weight
  • 175 g
  • 0 g
Technology
  • AMOLED
  • IPS LCD
Screen size
  • 5.5" inch
  • 5" inch
Screen resolution
  • 1080 x 1920 px
  • 720 x 1280 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 RAM
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
  • 4000 mAh
  • Removable Li-Po
Operating system OS
  • Android 7.1.1 (Nougat)
  • upgradable to Android 8 (Oreo); ZenUI 4
  • Android 6.0 (Marshmallow)
Chipset
  • Qualcomm MSM8998 Snapdragon 835 (10 nm)
  • Mediatek MT6735P (28 nm)
NFC
  • Yes
Unknown
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for Zenfone 4 Pro ZS551KL, E1.
SpecificationZenfone 4 Pro ZS551KLE1
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%
  • 66.6%
PPI /points per inch/
  • 401 PPI
  • 294 PPI
Screen protection
  • Corning Gorilla Glass 5
Unknown
Camera and Video
Camera and Video — specifications for Zenfone 4 Pro ZS551KL, E1.
SpecificationZenfone 4 Pro ZS551KLE1
Rear camera, main
  • 12 MP
  • Dual
  • 8 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
  • 8 MP
  • AF
  • f/2.2
Functions
  • HDR
  • LED flash
Video
  • 1080p@30fps
  • 1080p@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
Performance — specifications for Zenfone 4 Pro ZS551KL, E1.
SpecificationZenfone 4 Pro ZS551KLE1
Processor CPU
  • Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo)
  • Quad-core 1.0 GHz Cortex-A53
Graphics processor GPU
  • Adreno 540
  • Mali-T720MP2
General specs
General specs — specifications for Zenfone 4 Pro ZS551KL, E1.
SpecificationZenfone 4 Pro ZS551KLE1
Release date
  • 2017
  • August
  • 2017
  • January
Colors
  • Moonlight White
  • Pure Black
  • Black
  • Gold
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, E1.
SpecificationZenfone 4 Pro ZS551KLE1
SIM card
  • Hybrid Dual SIM (Nano-SIM
  • dual stand-by)
  • Dual SIM (Micro-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 / 2100 -4G - LTE band 3(1800)
  • 5(850)
Speed
  • HSPA 42.2/5.76 Mbps
  • LTE-A (3CA) Cat12 600/150 or 100 Mbps
  • HSPA 42.2/11.5 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 b/g/n
  • Wi-Fi Direct
  • hotspot
GPS
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
  • GALILEO
  • Yes
  • with A-GPS
USB
  • Type-C 1.0 reversible connector
  • microUSB 2.0
Bluetooth
  • 5.0
  • A2DP
  • EDR
  • LE
  • aptX
  • 4.0
  • A2DP
Music and Audio
Music and Audio — specifications for Zenfone 4 Pro ZS551KL, E1.
SpecificationZenfone 4 Pro ZS551KLE1
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, E1.
SpecificationZenfone 4 Pro ZS551KLE1
Dop
  • Sensors Fingerprint (front-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass
  • color spectrum
  • Infrared port - Fast battery charging: 50% in 32 min
  • Sensors Accelerometer
  • proximity
  • compass