Celkon A403 vs Xiaomi Redmi K20

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

    A403: 78 g lighter

    A403:
    113 g
    Redmi K20:
    191 g
  • Width

    A403: 9.3 mm narrower

    A403:
    65 mm
    Redmi K20:
    74.3 mm
  • Screen diagonal

    A403: 2.39 in smaller diagonal

    A403:
    4 in
    Redmi K20:
    6.39 in
  • Chipset

    A403:
    Spreadtrum SC7715
    Redmi K20:
    Qualcomm SDM730 Snapdragon 730 (8 nm)
  • Rear camera layout

    A403:
    Single
    Redmi K20:
    Triple
  • Depth

    Redmi K20: 1.4 mm thinner

    A403:
    10.2 mm
    Redmi K20:
    8.8 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. A403

    Height:
    125 mm
    Width:
    65 mm
    Depth:
    10.2 mm +1.4 mm versus Redmi K20
  2. 2. Redmi K20

    Height:
    156.7 mm +31.7 mm versus A403
    Width:
    74.3 mm +9.3 mm versus A403
    Depth:
    8.8 mm

Weight

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

  1. 1. A403

    113 g

  2. 2. Redmi K20

    191 g

    +78 g versus A403

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. A403

    Screen diagonal:
    4 in
    Aspect ratio (height:width):
    5:3
    Approximate rectangular screen area:
    45.5 cm²
  2. 2. Redmi K20

    Screen diagonal:
    6.39 in
    Aspect ratio (height:width):
    19.5:9
    Approximate rectangular screen area:
    100.2 cm²

Redmi K20 has approximately 120.1% more rectangular screen area than A403.

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.

A403: Original memory entry

4 GB · 512 MB RAM

Redmi K20: Original memory entry

256 GB · 8 GB RAM 64/128 GB · 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. A403

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 GB

2. Redmi K20

NFC:
Yes
Headphone jack:
Yes
Memory card support:
No

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. A403

    1400 mAh

  2. 2. Redmi K20

    4000 mAh

    +2600 mAh versus A403

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. A4032. Redmi K20

Everyday essentials
Everyday essentials — specifications for A403, Redmi K20.
SpecificationA403Redmi K20
Dimensions (HxWxD)
  • 125 Х 65 Х 10.2 mm
  • 156.7 Х 74.3 Х 8.8 mm
Weight
  • 113 g
  • 191 g
Technology Unknown
  • AMOLED
Screen size
  • 4" inch
  • 6.39" inch
Screen resolution
  • 480 x 800 px
  • 1080 x 2340 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 4 GB
  • 512 MB RAM
  • 256 GB
  • 8 GB RAM 64/128 GB
  • 6 GB RAM
Memory card support
  • microSD
  • up to 32 GB
  • No
Battery Capacity is not battery life. No endurance test is implied.
  • 1400 mAh
  • Li-Ion
  • 4000 mAh
  • Non-removable Li-Po
Operating system OS
  • Android 4.4.2 (KitKat)
  • Android 9.0 (Pie); MIUI 10
Chipset
  • Spreadtrum SC7715
  • Qualcomm SDM730 Snapdragon 730 (8 nm)
NFC Unknown
  • Yes
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for A403, Redmi K20.
SpecificationA403Redmi K20
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors Unknown
  • 16M
Screen area
  • 45.5 cm2
  • 100.2 cm2
Screen format
  • 5:3 (height:width)
  • 19.5:9 (height:width)
Screen to body ratio
  • 56.1%
  • 86.1%
PPI /points per inch/
  • 233 PPI
  • 403 PPI
Screen protection Unknown
  • Corning Gorilla Glass 5
Camera and Video
Camera and Video — specifications for A403, Redmi K20.
SpecificationA403Redmi K20
Rear camera, main
  • 3.15 MP
  • Single
  • 48 MP
  • Triple
Camera specs
  • 3.15 MP
  • 48 MP
  • f/1.8
  • 26mm (wide)
  • 1/2''
  • 0.8µm
  • PDAF -8 MP
  • f/2.4
  • 53mm (telephoto)
  • 1/4''
  • 1.12µm
  • PDAF
  • 2x optical zoom -13 MP
  • 12mm (ultrawide)
  • 1/3''
Functions
  • LED flash
  • HDR
Video
  • Yes
  • 1080p@30fps
Front camera, selfie
  • 1.3 MP
  • Single
  • 20 MP
  • Single
Specifications
  • 1.3 MP
  • Motorized pop-up 20 MP
  • f/2.2
  • 0.8µm
Performance

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

Performance — specifications for A403, Redmi K20.
SpecificationA403Redmi K20
Processor CPU
  • 1.0 GHz
  • Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver)
Graphics processor GPU Unknown
  • Adreno 618
GeekBench 4 Single Core * Unknown
  • 2963
GeekBench 4 Multi-Core * Unknown
  • 10109
GeekBench 5 Single Core * Unknown
  • 525
GeekBench 5 Multi-Core * Unknown
  • 1629
General specs
General specs — specifications for A403, Redmi K20.
SpecificationA403Redmi K20
Release date
  • 2015
  • August
  • 2019
  • May
Colors
  • Black
  • Light Blue
  • Red
  • Yellow
  • Carbon black
  • Flame red
  • Glacier blue
Historical recorded price Legacy catalogue value; date unknown. Not a current offer. Unknown
  • 260 EUR
Communication and Connectivity
Communication and Connectivity — specifications for A403, Redmi K20.
SpecificationA403Redmi K20
SIM card
  • Dual SIM
  • Dual SIM (Nano-SIM
  • dual stand-by)
Network
  • Show all network frequencies: -2G - GSM 900 / 1800 - SIM 1 & SIM 2
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE band 1(2100)
  • 3(1800)
  • 5(850)
  • 7(2600)
  • 8(900)
  • 34(2000)
  • 38(2600)
  • 39(1900)
  • 40(2300)
  • 41(2500)
Speed
  • HSPA
  • HSPA 42.2/5.76 Mbps
  • LTE-A
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • Wi-Fi Direct
  • hotspot
GPS
  • A-GPS
  • Yes
  • with A-GPS
  • GLONASS
  • GALILEO
  • BDS
USB
  • microUSB 2.0
  • 2.0
  • Type-C 1.0 reversible connector
  • USB On-The-Go
Bluetooth
  • 2.0
  • 5.0
  • A2DP
  • LE
  • aptX HD
Harmful irradiation
  • SAR EU - 0.38 W/kg (head) 0.68 W/kg (body)
Unknown
Music and Audio
Music and Audio — specifications for A403, Redmi K20.
SpecificationA403Redmi K20
Radio
  • FM radio
  • Yes
Others Unknown
  • HDR
  • 24-bit/192kHz audio -Active noise cancellation with dedicated mic
Other features
Other features — specifications for A403, Redmi K20.
SpecificationA403Redmi K20
Dop
  • Sensors Accelerometer
  • Sensors Fingerprint (under display)
  • accelerometer
  • gyro
  • proximity
  • compass - Fast battery charging 18W - Also known as Xiaomi Mi 9T in Russia