Asus Zenfone Max Pro (M2) ZB631KL vs Sendo X

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

    X: 55 g lighter

    Zenfone Max Pro (M2) ZB631KL:
    175 g
    X:
    120 g
  • Width

    X: 26.5 mm narrower

    Zenfone Max Pro (M2) ZB631KL:
    75.5 mm
    X:
    49 mm
  • Screen diagonal

    X: 4.06 in smaller diagonal

    Zenfone Max Pro (M2) ZB631KL:
    6.26 in
    X:
    2.2 in
  • Chipset

    Zenfone Max Pro (M2) ZB631KL:
    Qualcomm SDM660 Snapdragon 660 (14 nm)
    X:
    TI OMAP 5910
  • Rear camera layout

    Zenfone Max Pro (M2) ZB631KL:
    Dual
    X:
    Single
  • Depth

    Zenfone Max Pro (M2) ZB631KL: 14.5 mm thinner

    Zenfone Max Pro (M2) ZB631KL:
    8.5 mm
    X:
    23 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 Max Pro (M2) ZB631KL

    Height:
    157.9 mm +47.9 mm versus X
    Width:
    75.5 mm +26.5 mm versus X
    Depth:
    8.5 mm
  2. 2. X

    Height:
    110 mm
    Width:
    49 mm
    Depth:
    23 mm +14.5 mm versus Zenfone Max Pro (M2) ZB631KL

Weight

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

  1. 1. Zenfone Max Pro (M2) ZB631KL

    175 g

    +55 g versus X

  2. 2. X

    120 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.

At least two phones need compatible screen dimensions for a drawing.

  1. 1. Zenfone Max Pro (M2) ZB631KL

    Screen diagonal:
    6.26 in
    Aspect ratio (height:width):
    19:9
    Approximate rectangular screen area:
    97.8 cm²
  2. 2. X

    X: Screen geometry unavailable or conflicting.

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.

No unambiguous storage/RAM pairings are recorded. See the original specifications below.

Zenfone Max Pro (M2) ZB631KL: Original memory entry

64 GB · 4/6 GB RAM 32 GB · 3 GB RAM

X: Original memory entry

32 MB

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 Max Pro (M2) ZB631KL

NFC:
Yes
Headphone jack:
Yes
Memory card support:
See details microSD · up to 512 GB (dedicated slot)

2. X

NFC:
Unknown
Headphone jack:
No
Memory card support:
See details MMC/SD

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 Max Pro (M2) ZB631KL

    5000 mAh

    +3950 mAh versus X

  2. 2. X

    1050 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 Max Pro (M2) ZB631KL2. X

Everyday essentials
Everyday essentials — specifications for Zenfone Max Pro (M2) ZB631KL, X.
SpecificationZenfone Max Pro (M2) ZB631KLX
Dimensions (HxWxD)
  • 157.9 Х 75.5 Х 8.5 mm
  • 110 Х 49 Х 23 mm
Weight
  • 175 g
  • 120 g
Technology
  • IPS LCD
  • TFT
Screen size
  • 6.26" inch
  • 2.2" inch
Screen resolution
  • 1080 x 2280 px
  • 176 x 220 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 64 GB
  • 4/6 GB RAM 32 GB
  • 3 GB RAM
  • 32 MB
Memory card support
  • microSD
  • up to 512 GB (dedicated slot)
  • MMC/SD
Battery Capacity is not battery life. No endurance test is implied.
  • 5000 mAh
  • Non-removable Li-Po
  • 1050 mAh
  • Removable Li-Po
Operating system OS
  • Android 8.1 (Oreo)
  • Symbian 6.1
  • Series 60 v1.0 UI
Chipset
  • Qualcomm SDM660 Snapdragon 660 (14 nm)
  • TI OMAP 5910
NFC
  • Yes
Unknown
Headphone jack
  • Yes
  • No
Display
Display — specifications for Zenfone Max Pro (M2) ZB631KL, X.
SpecificationZenfone Max Pro (M2) ZB631KLX
Touchscreen
  • capacitive touchscreen
Unknown
Display colors
  • 16M
  • 65K
Screen area
  • 97.8 cm2
  • 15.2 cm2
Screen format
  • 19:9 (height:width)
Unknown
Screen to body ratio
  • 82.0%
  • 28.3%
PPI /points per inch/
  • 403 PPI
  • 0 PPI
Screen protection
  • Corning Gorilla Glass 6
Unknown
Camera and Video
Camera and Video — specifications for Zenfone Max Pro (M2) ZB631KL, X.
SpecificationZenfone Max Pro (M2) ZB631KLX
Rear camera, main
  • 12 MP
  • Dual
  • 0.3 MP
  • Single
Camera specs
  • 12 MP
  • f/1.8
  • 1/2.9''
  • 1.25µm
  • PDAF -5 MP
  • f/2.4
  • 1.12µm
  • depth sensor
Unknown
Functions
  • LED flash
  • HDR
  • LED flash
Video
  • 1080p@30fps
  • Yes
Front camera, selfie
  • 13 MP
  • Single
  • 0 MP,
Specifications
  • 13MP
  • f/2.0
  • 1.12µm
Unknown
Performance

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

Performance — specifications for Zenfone Max Pro (M2) ZB631KL, X.
SpecificationZenfone Max Pro (M2) ZB631KLX
Processor CPU
  • Octa-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260)
  • 120 MHz ARM925T
Graphics processor GPU
  • Adreno 512
Unknown
GeekBench 5 Single Core *
  • 291
Unknown
GeekBench 5 Multi-Core *
  • 1204
Unknown
General specs
General specs — specifications for Zenfone Max Pro (M2) ZB631KL, X.
SpecificationZenfone Max Pro (M2) ZB631KLX
Release date
  • 2018
  • December
  • 2003
  • Q4
Colors
  • Blue
  • Titanium
Unknown
Battery life Unknown
  • Stand by time- Up to 170 h Talking time- Up to 7 h
Body build
  • Front glass
  • plastic body
Unknown
Communication and Connectivity
Communication and Connectivity — specifications for Zenfone Max Pro (M2) ZB631KL, X.
SpecificationZenfone Max Pro (M2) ZB631KLX
SIM card
  • Dual SIM (Nano-SIM
  • dual stand-by)
  • Mini-SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 850 / 900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 5(850)
  • 7(2600)
  • 8(900)
  • 20(800)
  • 40(2300)
Unknown
Speed
  • HSPA 42.2/5.76 Mbps
  • LTE-A (3CA) Cat9 450/50 Mbps
Unknown
GPRS
  • Yes
  • Class 8
Edge
  • Yes
  • No
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • WiFi Direct
  • hotspot
  • No
GPS
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
  • GALILEO
  • QZSS
  • No
USB
  • microUSB 2.0
  • USB On-The-Go
  • Proprietary
Bluetooth
  • 5.0
  • A2DP
  • LE
  • 1.1
Music and Audio
Music and Audio — specifications for Zenfone Max Pro (M2) ZB631KL, X.
SpecificationZenfone Max Pro (M2) ZB631KLX
Radio
  • FM radio
  • No
Others
  • Active noise cancellation with dedicated mic
Unknown
Other features
Other features — specifications for Zenfone Max Pro (M2) ZB631KL, X.
SpecificationZenfone Max Pro (M2) ZB631KLX
Dop
  • Sensors Fingerprint (rear-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass - Charging 5V/2A 10W
  • Infrared port - MP4/MP3 player -Sync ML