Samsung Galaxy A8s vs vivo X21

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

    Galaxy A8s:
    LCD
    X21:
    OLED
  • Weight

    X21: 16.8 g lighter

    Galaxy A8s:
    173 g
    X21:
    156.2 g
  • Chipset

    Galaxy A8s:
    Qualcomm SDM710 Snapdragon 710 (10 nm)
    X21:
    Qualcomm SDM660 Snapdragon 660 (14 nm)
  • Rear camera layout

    Galaxy A8s:
    Triple
    X21:
    Dual
  • Height

    X21: 3.9 mm shorter

    Galaxy A8s:
    158.4 mm
    X21:
    154.5 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. Galaxy A8s

    Height:
    158.4 mm +3.9 mm versus X21
    Width:
    74.9 mm
    Depth:
    7.4 mm
  2. 2. X21

    Height:
    154.5 mm
    Width:
    74.8 mm
    Depth:
    7.4 mm

Weight

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

  1. 1. Galaxy A8s

    173 g

    +16.8 g versus X21

  2. 2. X21

    156.2 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. Galaxy A8s

    Screen diagonal:
    6.4 in
    Aspect ratio (height:width):
    19.5:9
    Approximate rectangular screen area:
    100.5 cm²
  2. 2. X21

    Screen diagonal:
    6.28 in
    Aspect ratio (height:width):
    19:9
    Approximate rectangular screen area:
    98.4 cm²

Galaxy A8s has approximately 2.1% more rectangular screen area than X21.

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 Galaxy A8s, X21, compared at the same storage capacity.
StorageGalaxy A8sX21
64 GB Unknown 6 GB RAM
128 GB Unknown 6 GB RAM
Galaxy A8s: Original memory entry

128 GB · 6/8 GB 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. Galaxy A8s

NFC:
Yes
Headphone jack:
No
Memory card support:
See details microSD · up to 512 GB

2. X21

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 256 GB (uses SIM 2 slot)

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. Galaxy A8s

    3400 mAh

    +200 mAh versus X21

  2. 2. X21

    3200 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. Galaxy A8s2. X21

Everyday essentials
Everyday essentials — specifications for Galaxy A8s, X21.
SpecificationGalaxy A8sX21
Dimensions (HxWxD)
  • 158.4 Х 74.9 Х 7.4 mm
  • 154.5 Х 74.8 Х 7.4 mm
Weight
  • 173 g
  • 156.2 g
Technology
  • IPS LCD
  • Super AMOLED
Screen size
  • 6.4" inch
  • 6.28" inch
Screen resolution
  • 1080 x 2340 px
  • 1080 x 2280 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 128 GB
  • 6/8 GB RAM
  • 64/128 GB
  • 6 GB RAM
Memory card support
  • microSD
  • up to 512 GB
  • microSD
  • up to 256 GB (uses SIM 2 slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 3400 mAh
  • Non-removable Li-Ion
  • 3200 mAh
  • Non-removable Li-Ion
Operating system OS
  • Android 9.0 (Pie)
  • Android 8.1 (Oreo); Funtouch 4
Chipset
  • Qualcomm SDM710 Snapdragon 710 (10 nm)
  • Qualcomm SDM660 Snapdragon 660 (14 nm)
NFC
  • Yes
Unknown
Headphone jack
  • No
  • Yes
Display
Display — specifications for Galaxy A8s, X21.
SpecificationGalaxy A8sX21
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 100.5 cm2
  • 98.4 cm2
Screen format
  • 19.5:9 (height:width)
  • 19:9 (height:width)
Screen to body ratio
  • 84.7%
  • 85.2%
PPI /points per inch/
  • 403 PPI
  • 402 PPI
Camera and Video
Camera and Video — specifications for Galaxy A8s, X21.
SpecificationGalaxy A8sX21
Rear camera, main
  • 24 MP
  • Triple
  • 12 MP
  • Dual
Camera specs
  • 24 MP
  • f/1.7
  • PDAF -10 MP
  • AF -5 MP
  • f/2.2
  • depth sensor
  • 12 MP
  • f/1.8
  • 1/2.55''
  • 1.4µm
  • dual pixel PDAF -5 MP
  • f/2.4
  • depth sensor
Functions
  • HDR
  • LED flash
  • HDR
  • panorama
Video
  • 1080p@30fps
  • 1080p@30fps
Front camera, selfie
  • 24 MP
  • Single
  • 12 MP
  • Single
Specifications
  • 24 MP
  • f/2.0
  • 12 MP
  • f/2.0
Performance

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

Performance — specifications for Galaxy A8s, X21.
SpecificationGalaxy A8sX21
Processor CPU
  • Octa-core (2x2.2 GHz 360 Gold & 6x1.7 GHz Kryo 360 Silver)
  • Octa-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260)
Graphics processor GPU
  • Adreno 616
  • Adreno 512
Antutu 7 score *
  • 170322
  • 143728
GeekBench 4 Single Core * Unknown
  • 1806
GeekBench 4 Multi-Core * Unknown
  • 4240
General specs
General specs — specifications for Galaxy A8s, X21.
SpecificationGalaxy A8sX21
Release date
  • 2018
  • December
  • 2018
  • March
Colors
  • Blue
  • Gray
  • Black
  • Black
  • Aurora White
  • Ruby Red
Historical recorded price Legacy catalogue value; date unknown. Not a current offer. Unknown
  • 450 EUR
Body build
  • Front/back glass
  • aluminum frame
  • Front glass
  • aluminum body
Communication and Connectivity
Communication and Connectivity — specifications for Galaxy A8s, X21.
SpecificationGalaxy A8sX21
SIM card
  • Single SIM (Nano-SIM)Dual SIM (Nano-SIM
  • dual stand-by)
  • Hybrid Dual SIM (Nano-SIM
  • dual stand-by)
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) -3G - HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 -4G - LTE
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE band 1(2100)
  • 2(1900)
  • 3(1800)
  • 5(850)
  • 8(900)
  • 34(2000)
  • 38(2600)
  • 39(1900)
  • 40(2300)
  • 41(2500)
Speed
  • HSPA
  • LTE
  • HSPA 42.2/5.76 Mbps
  • LTE-A (2CA) Cat6 300/50 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
  • dual-band
  • WiFi Direct
  • hotspot
GPS
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
  • Yes
  • with A-GPS
  • GLONASS
USB
  • 2.0
  • Type-C 1.0 reversible connector
  • microUSB 2.0
  • USB On-The-Go
Bluetooth
  • 5.0
  • A2DP
  • EDR
  • LE
  • 5.0
  • A2DP
  • LE
Music and Audio
Music and Audio — specifications for Galaxy A8s, X21.
SpecificationGalaxy A8sX21
Radio
  • FM radio
  • FM radio
Others
  • Always-on display
  • Active noise cancellation with dedicated mic
  • 32-bit/192kHz audio -Active noise cancellation with dedicated mic
Other features
Other features — specifications for Galaxy A8s, X21.
SpecificationGalaxy A8sX21
Dop
  • Sensors Fingerprint (rear-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass - Fast battery charging -ANT+ - Samsung Pay - Also known as Samsung Galaxy A9 Pro (2019) in South Korea
  • Sensors Fingerprint (rear-mounted)
  • accelerometer
  • proximity
  • compass - Fast battery charging