Oppo A12e vs vivo X21 UD

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

    A12e:
    LCD
    X21 UD:
    OLED
  • Weight

    X21 UD: 11.8 g lighter

    A12e:
    168 g
    X21 UD:
    156.2 g
  • Chipset

    A12e:
    Qualcomm SDM450 Snapdragon 450 (14 nm)
    X21 UD:
    Qualcomm SDM660 Snapdragon 660 (14 nm)
  • Depth

    X21 UD: 0.8 mm thinner

    A12e:
    8.2 mm
    X21 UD:
    7.4 mm
  • Release year

    A12e:
    2020
    X21 UD:
    2018

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. A12e

    Height:
    156.2 mm
    Width:
    75.6 mm
    Depth:
    8.2 mm +0.8 mm versus X21 UD
  2. 2. X21 UD

    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. A12e

    168 g

    +11.8 g versus X21 UD

  2. 2. X21 UD

    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. A12e

    Screen diagonal:
    6.2 in
    Aspect ratio (height:width):
    19:9
    Approximate rectangular screen area:
    95.9 cm²
  2. 2. X21 UD

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

X21 UD has approximately 2.6% more rectangular screen area than A12e.

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 A12e, X21 UD, compared at the same storage capacity.
StorageA12eX21 UD
64 GB 3 GB RAM Not recorded
128 GB Not recorded 6 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. A12e

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSDXC (dedicated slot)

2. X21 UD

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. A12e

    4230 mAh

    +1030 mAh versus X21 UD

  2. 2. X21 UD

    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. A12e2. X21 UD

Everyday essentials
Everyday essentials — specifications for A12e, X21 UD.
SpecificationA12eX21 UD
Dimensions (HxWxD)
  • 156.2 Х 75.6 Х 8.2 mm
  • 154.5 Х 74.8 Х 7.4 mm
Weight
  • 168 g
  • 156.2 g
Technology
  • IPS LCD
  • Super AMOLED
Screen size
  • 6.2" inch
  • 6.28" inch
Screen resolution
  • 720 x 1520 px
  • 1080 x 2280 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 64GB 3GB RAM
  • 128 GB
  • 6 GB RAM
Memory card support
  • microSDXC (dedicated slot)
  • microSD
  • up to 256 GB (uses SIM 2 slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 4230 mAh
  • Non-removable Li-Ion
  • 3200 mAh
  • Non-removable Li-Ion
Operating system OS
  • Android 8.1 (Oreo); ColorOS 5.1
  • Android 8.1 (Oreo); Funtouch 4
Chipset
  • Qualcomm SDM450 Snapdragon 450 (14 nm)
  • Qualcomm SDM660 Snapdragon 660 (14 nm)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for A12e, X21 UD.
SpecificationA12eX21 UD
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 95.9 cm2
  • 98.4 cm2
Screen format
  • 19:9 (height:width)
  • 19:9 (height:width)
Screen to body ratio
  • 81.2%
  • 85.2%
PPI /points per inch/
  • 271 PPI
  • 402 PPI
Camera and Video
Camera and Video — specifications for A12e, X21 UD.
SpecificationA12eX21 UD
Rear camera, main
  • 13 MP
  • Dual
  • 12 MP
  • Dual
Camera specs
  • 13 MP
  • f/2.2
  • AF -2 MP
  • f/2.4
  • (depth)
  • 12 MP
  • f/1.8
  • 1/2.55''
  • 1.4µm
  • dual pixel PDAF -5 MP
  • f/2.4
  • depth sensor
Functions
  • LED flash
  • HDR
  • panorama
  • LED flash
  • HDR
  • panorama
Video
  • 1080p@30fps
  • 1080p@30fps
Front camera, selfie
  • 8 MP
  • Single
  • 12 MP
  • Single
Specifications
  • 8 MP
  • f/2.2
  • 12 MP
  • f/2.0
Performance

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

Performance — specifications for A12e, X21 UD.
SpecificationA12eX21 UD
Processor CPU
  • Octa-core 1.8 GHz Cortex-A53
  • Octa-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260)
Graphics processor GPU
  • Adreno 506
  • Adreno 512
Antutu 7 score * Unknown
  • 143592
General specs
General specs — specifications for A12e, X21 UD.
SpecificationA12eX21 UD
Release date
  • 2020
  • April 3
  • 2018
  • March
Colors
  • Red
  • Dark Purple
  • Black
  • Ruby Red
Historical recorded price Legacy catalogue value; date unknown. Not a current offer. Unknown
  • 550 EUR
Body build
  • Glass front
  • plastic back
  • plastic frame
  • Front glass
  • aluminum body
Communication and Connectivity
Communication and Connectivity — specifications for A12e, X21 UD.
SpecificationA12eX21 UD
SIM card
  • 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 -3G - HSDPA 850 / 900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 5(850)
  • 7(2600)
  • 8(900)
  • 38(2600)
  • 40(2300)
  • 41(2500)
  • 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 42.2/5.76 Mbps
  • LTE-A (2CA) Cat6 300/50 Mbps
  • 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 b/g/n
  • Wi-Fi Direct
  • hotspot
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • WiFi Direct
  • hotspot
GPS
  • Yes
  • with A-GPS
  • Yes
  • with A-GPS
  • GLONASS
USB
  • microUSB 2.0
  • USB On-The-Go
  • microUSB 2.0
  • USB On-The-Go
Bluetooth
  • 4.2
  • A2DP
  • LE
  • 5.0
  • A2DP
  • LE
Music and Audio
Music and Audio — specifications for A12e, X21 UD.
SpecificationA12eX21 UD
Radio
  • FM radio
  • FM radio
Others Unknown
  • 32-bit/192kHz audio -Active noise cancellation with dedicated mic
Other features
Other features — specifications for A12e, X21 UD.
SpecificationA12eX21 UD
Dop
  • Sensors Accelerometer
  • proximity
  • compass
  • Sensors Fingerprint (under display)
  • accelerometer
  • proximity
  • compass - Fast battery charging